Product Introduction:




Brotherpack supplies two widely‑used lightweight‑neck PET preforms for manufacturing mineral water and beverage bottles:
- 29‑25 (also written as 2925): economy lightweight neck, outer diameter 29 mm
- 30‑25 (also written as 3025, Binglu standard): multi‑purpose heavy‑duty neck, outer diameter 30 mm
Critical technical reminder for buyers
The numbers refer to independent industrial neck standards:
29‑25 = outer neck diameter 29 mm, inner opening ~25 mm
30‑25 = outer neck diameter 30 mm, inner opening ~25 mm
They are not interchangeable. Thread profiles differ completely. Each neck requires its own matching bottle cap, injection mold and blow mold. Confirm your neck standard before ordering samples or bulk goods.
Both preform lines are injection‑molded from virgin food‑grade PET resin, supported by SGS FDA food‑contact test reports and factory Declaration of Conformity.
We offer clear preforms in stock for fast lead time, custom Pantone color injection, and pre‑production sample testing for all available weights.
Core difference in application:
29‑25 / 2925: cost‑optimized for large‑volume, room‑temperature blow molding only (still/mineral water, NOT for hot fill). Suitable for bottles from 200ml up to 2L. 30‑25 / 3025: stronger neck structure, works for normal blow molding and high‑temperature hot‑fill processes (water, juice, iced tea, sports drinks). Fits bottle volumes from 250ml up to 2.5L.
| Specification | 29‑25 (2925) Light Economy Neck | 30‑25 (3025 / Binglu) Multi‑Purpose Neck |
|---|---|---|
| Neck Standard | 29‑25 / 2925 Light Neck | 30‑25 / 3025 / Binglu 30mm Beverage Neck |
| Outer Neck Diameter | 29 mm | 30 mm |
| Raw Material | Virgin food‑grade PET resin | Virgin food‑grade PET resin |
| Available Weight | 10.5g‑32g | 13g‑55g |
| Weight Tolerance | ±0.3‑0.5 g | ±0.3‑0.5 g |
| Standard Color | Clear transparent | Clear transparent |
| Customization | Pantone color injection | Pantone color injection |
| Best For | Mass‑produced purified / mineral water | Water, juice, sports drinks, hot‑fill beverages |
| Molding Limit | Room‑temperature blow molding only | Normal blow molding + hot‑fill blow molding |
| Suitable Bottle Volume | 200ml‑2L | 250ml‑2.5L |
29‑25 (2925) Light-Weight, Length and Packing
| Weight | Preform Length | Carton Dimension | Quantity per Carton |
|---|---|---|---|
| 10.5 g | 6.85 cm | 4938.528.5 cm | 1030 pcs (single‑layer reinforced) |
| 15 g | 8.85 cm | 5336.537.5 cm | 1200 pcs |
| 18 g | 9.8 cm | 5336.537.5 cm | 880 pcs |
| 19.5 g | 9.8 cm | 5336.537.5 cm | 880 pcs |
| 22.5 g | 10.5 cm | 5336.537.5 cm | 820 pcs |
| 32 g | 12.63 cm | 5333.538 cm | 650 pcs |
30‑25 (3025 / Binglu) Full Weight, Length & Packing
| Weight | Preform Length | Carton Dimension | Quantity per Carton | Shipping Info |
|---|---|---|---|---|
| 16 g | 9.15 cm | 49.53828 cm | 930 pcs (interlocked packing) | — |
| 17 g | 9.35 cm | 5336.537.5 cm | 920 pcs | — |
| 25 g | 10.8 cm | 5336.537.5 cm | 630 pcs | — |
| 28 g | 10.8 cm | 5333.533 cm | 520 pcs (standing packing) | 1115 cartons / 40HQ |
| 30 g | 11.5 cm | 5333.533 cm | 480 pcs (standing packing) | 1115 cartons / 40HQ |
| 32 g | 11.5 cm | 5333.533 cm | 480 pcs (standing packing) | 1115 cartons / 40HQ |
| 35 g | 11.5 cm | 5333.533 cm | 480 pcs (standing packing) | 1115 cartons / 40HQ |
Download Full Detailed Specifications
The above is a brief overview of our production capacity. Complete data including models, weights, dimensions and carton packing quantities are available in the full specification sheet for download via the button below.
The file is categorized by product line with clear tables, which can be exported as PDF for catalog sharing and quotation reference with clients.
Product Features
Common advantages for both neck standards
✅ Made from brand‑new food‑grade PET particles, no recycled material.
✅ Consistent weight tolerance (±0.3‑0.5g) ensures even wall thickness after bottle blowing.
✅ Clear stock preforms support quick shipment for bulk orders.
✅ Custom colored preforms available by Pantone number (MOQ applies).
✅ Free test samples can be arranged for mold and cap validation.
Unique advantages of 29‑25 (2925)
✅ Lightened neck structure cuts raw‑material cost for high‑volume mineral‑water projects.
✅ Mature, widely‑adopted standard for large water bottling lines in Asia, Africa and Latin America.
Unique advantages of 30‑25 (3025 / Binglu)
✅ Reinforced neck construction for higher thermal resistance, safe for hot‑fill production.
✅ Wider weight range from light disposable to heavy‑duty preforms.
✅ Optimized carton stacking design for full 40HQ sea shipments, lowering ocean freight per unit.
Compliance and Supply Support
Raw‑material certificate: SGS test report available for virgin PET resin according to US FDA 21 CFR 177.1520 for food‑contact applications.
Factory compliance: We can provide a stamped Declaration of Conformity (DoC) for preforms upon request.
Order flexibility: We accept small trial sample orders and full container bulk orders.
Technical service: Our team can share blow‑molding guidance and neck‑standard selection advice.
Lead time: Clear standard preforms: 7‑15 working days; custom‑colored preforms: 15‑25 working days.
Internal Links
Looking for other preform sizes? Check our full range of PET Bottle Preforms.
Browse finished goods: Squeeze bottles & food‑grade plastic containers.
Our PET Preform and Plastic Bottle Sample Showroom
Our factory showroom displays a wide range of PET preforms and finished plastic bottles in multiple sizes and custom colors. Customers can view different specifications of food-grade packaging samples, including PET preforms for edible oil, beverage and protein powder containers. We support custom mold development and color matching for your packaging projects.


Packaging and Shipping
Packaging
- Preforms are packed in sturdy cartons with protective inner layers to avoid scratches and deformation during transit. Each carton is marked with product model, quantity and shipping information for easy warehouse management.
- Shipping Cost & Tariff Benefits of Bottle Preform Shipment
- Shipping bottle preforms instead of finished bottles brings obvious economic advantages for importers:
- Space saving: Preforms take much less container space compared with finished hollow bottles. More goods can be loaded per container, reducing unit freight cost.
- Lower import tariff: In many countries, bottle preforms enjoy more favorable tariff rates than finished plastic bottles. It helps importers cut customs duty expenditure significantly.
- Reduced damage risk: Compact preform shape is less prone to breakage and collision damage during long‑distance sea or air transport.
- Flexible local production: Buyers can blow‑mold preforms into finished bottles at local factories, realizing on‑demand production and cutting finished‑goods inventory pressure.
Frequently Asked Questions
Q1: Can I put 29‑25 caps onto 30‑25 preforms?
A: No. The two neck standards have different thread profiles. Caps, blow molds and injection molds cannot be shared. Always match preform neck, cap and mold.
Q2: Which neck is suitable for hot‑filled juice?
A: Only 30‑25 (3025). The lightweight 29‑25 (2925) neck may deform under hot‑fill temperatures.
Q3: Is the FDA document enough for importing preforms into the USA?
A: Most US beverage and packaging importers accept the combination of SGS resin report + factory DoC. For special third‑party finished‑preform tests, we can quote separately.
Q4: What is the difference between “29‑25” and “2925”?
A: They mean the same neck. Engineers often write 29‑25 with a hyphen; order sheets and part numbers are often written as 2925 without punctuation. The same rule applies to 30‑25 / 3025.
Q5: What bottle sizes fit these necks?
A: 29‑25 fits bottles 200ml‑2L; 30‑25 suits 250ml‑2.5L. Actual final volume also depends on preform gram weight and blow mold design.
Our Certifications and Qualifications
“ISO 90012015 Quality Management System Certificate”
“Food Plastic Packaging Bottles Production Administrative Approval”
“Design Patent Certificate – Hair Dye Press Cap”
“Design Patent Certificate – Hair Dye Press Cap (2)”
“Utility Model Patent Certificate – Cosmetic Outer Cover Clamping Device”
“Utility Model Patent Certificate – New Cosmetic Packaging Bottle”
“Utility Model Patent Certificate – Easy-to-Fix Cosmetic Bottle”
“Utility Model Patent Certificate – Injection Mold for Internal Thread Bottle Cap”
“Utility Model Patent Certificate – Cosmetic Cap Directional Moving Structure”
“Utility Model Patent Certificate – Bottle Cap Forward & Reverse Correction Device”
“Utility Model Patent Certificate – Cosmetic Cap Screwing Equipment”
“Fourth session member unit certificate issued by Suzhou Daily Chemical Industry Association”
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