The hand impulse sealer is made of metal cover, for sealing the bags easily and convenient. Have the size: 200mm, 300mm. This hand impulse sealer is made of iron, is for sealing the bags easily and convenient. Have the size: 200mm, 300mm. Other kind:plastic impulse sealer(100mm, 200mm, 300mm, 400mm), metal impulse sealers(200mm, 300mm), aluminum impulse sealers(100mm, 200mm, 300mm, 400mm)