PET Serrated Seal We are the biggest PET Strap Seal/Metal clips manufacturer in China. Our daily output 1,440,000 pcs. We have 20 production machines to produce PET Strap Seal from 1994. Our PET Strap Seals are serrated, which can hold strap firmly after sealing. Our PET Strap Seals are made from high quality steel. Main Market: We mainly export to USA, Middle East, Southeast Asia, Europe and Australia. Delivery: Within 3 days.