KeepFresh 4" x 6" Shrink Wrap Bags, 100 Gauge Clear PVC Heat Film, 500 Pieces Lot of 500ea. 4"x6" Shrink Bags PVC film shrinks to fit. Recommended for candles, trading cards, small parts, batteries, etc. Speed your packaging operations with these crystal clear bags in seconds. Place your product in bag and seal with heat gun.