This 63mm white polypropylene screw cap with 63-400 finish provides a reliable, airtight closure for glass and PET plastic jars requiring a mid-size opening, including our 16oz PET mason jar and specialty food containers. Food-safe and BPA-free, it delivers a consistent, secure thread seal suited for jams, sauces, condiments, spices, and specialty food products across retail and co-packing applications. Its clean white finish provides a neutral, label-ready surface compatible with a wide range of brand aesthetics. Available in wholesale case quantities for food manufacturers, co-packers, artisan producers, and wholesale distributors.