Adjustable flow control and tapered dispenser tip provides control when dispensing foam sealant for filling, sealing and insulating gaps, cracks and window/door jambs Extended barrels for long reach applications Comes with a Teflon coated can adapter and a Teflon Coated Needle Has a stainless steel check valve Once foam sealant can is attached and used, gun allows storage with replaceable tip Re-startable up to 30 days