In the packaging industry for food, beverages, alcohol, and pharmaceuticals, ROPP aluminum caps (Roll-On Pilfer Proof) are widely used for their excellent sealing performance, tamper-evident features, and good adaptability to automated production.
Among various sizes, the 31.5 mm aluminum ROPP caps stands out for its broad compatibility, elegant appearance, and reliable sealing, making it a popular choice for sealing glass bottles, PET bottles, beverage containers, and wine bottles.
31.5 mm aluminum closures are mainly designed to fit glass and PET bottle necks, commonly used for packaging spirits, wine, olive oil, pharmaceuticals, and more.
Compared with plastic or standard screw caps, ROPP aluminum caps offer superior tamper resistance and improved sealing.
Specifications
Diameter: 31.5 mm
Height: Customizable
Material: 8011-H14 / 3105-H14 aluminum
Liner Material: PE, TPE, EPE, Saranex
Surface Finish: Glossy, matte, coated, hot stamping, printed
Customization: Logo printing, color, pattern, anti-counterfeit marking
Samples: Available
Applications: Vodka, whisky, beverages, pharmaceuticals, olive oil
Packaging: Cartons + wooden pallets
MOQ: 80,000 pcs
31.5 mm Aluminum ROPP Cap - Product Display
Common 31.5 mm ROPP Cap Sizes
Other dimensions are available upon request!
31.5 mm ROPP Cap Price
The ex-factory unit price for 31.5 mm aluminum screw caps produced by HAOMEI Aluminum typically ranges between USD 0.03 and 0.08 per piece, depending on order quantity and specifications.
The minimum order quantity (MOQ) is 80,000 pieces. For large-volume orders, the price can be even lower.
If the caps require multicolor printing, silk-screen printing, embossing or debossing designs, or customized liners, the price can range from USD 0.10 to 0.25 per piece or more, depending on the complexity. (Exact quotations are provided by our sales manager.)
Purchasing Tips for Bottle Caps
Confirm exact specifications: Make sure to provide the supplier with the bottle neck thread standard, closure diameter, height, and liner requirements to ensure a perfect fit.
Plan ahead: Aluminum material sourcing and customized production require lead time. For large orders, it’s wise to lock in pricing and production schedules early.
Compare suppliers wisely: When comparing prices, consider not just the unit price but also quality control (QC) standards, lead times, and service capabilities of the supplier.
