There are two kinds of pedal sealers:impules sealer and direct heatsealer,lmpulse sealer is suitable for sealing polyvinyl chloride,polyethylene bags.Direct heat sealer is suit-able for sealing cellophane,aluminiun foil,copper foil,tin foil and polystyrene compound bags and heat prints the production date and expiration date in the seal.The temperature is electronically controlled and is eas to be adjusted.The temperature is stably contrclled.