Features: The shrink wrap bags are made of high-quality PVC material, durable to use The heat shrink wrap film with high light transmittance, which makes the keys are clearly visible.Strong shrinkage, easy to leave air inside. Clear PVC Heat Shrink Wrap. Easy to use: use heat device or heat tunnels to shrink Easy to attach and remove the shrink film Notice: Please allow 1-3cm deviation due to manual measurement Specification: Material:PVC Size:(Optional) 10x15cm 12x17cm 15x25cm 18x30cm 24x34cm 28x45cm Easy to use: Step1: Put the product that you need in If the shrink wrap bags are too long then cut it to suit for the product. Step 2: Dry product cover with hairdryer from the top in the hot wind, It will shrink to the size of the product. Step 3: Fold the excess part to the backside of the product, close with hot wind. includes: 100x Heat Shrink Film