The Clearmount System is instantly hot enough to seal and uses any centerfold film. Systems include a wand sealer, power supply with transformer, industrial quality heat gun, film dispenser, silicone and rubber sealing pad and an extra sealing wire. Since sealer is not attached you can use it for larger pieces. Recommended for artists who want the best protection at the best price. Acid-free 250ft film rolls are high quality center-folded shrink film made out of soft and safe polyolefin, which is chemically inert and free of acids and plasticizers. Economy 60 gauge grade or 100 gauge graphics grade.