The SealerSales WN-1300H 51" Long Hand Sealer w/ 2.7mm Seal Width is designed to provide strong, airtight, and watertight seals for polyethylene (PE) and polypropylene (PP) materials. The sealer is made of steel for durability and has a seal length of 51 inches and a seal width of 2.7mm. It only use power and becomes hot when the seal arm is depressed to seal a bag. It immediately cools after sealing. It has an adjustable solid-state timer for sealing materials of varying thicknesses. This sealer is portable, lightweight, and sturdy.