We offer a large selection of Self-Sealing Flat Poly Bags. You can search many types of Coin, Permanent Adhesive, Resealable Adhesive, Resealable Micro-perforated and Tamper-Evident. Metallocene color-coded coin/tamper-evident bags - blue (5 mil) can widely used in banks, casinos, and retail establishments to separate and color code coin denominations. Puncture-resistant metallocene bag. Metallocene Color-Coded Coin - Tamper-Evident Bag can widely used in banks, casinos, and retail establishments to separate and color code coin denominations.