Main body made of luxurious aluminium alloy Brass thread inside the universal adapter High quality at cost-effective price Spray gun is used for injecting polyurethane (PU) foam sealant, such as 750 and 500mL volume in can/tinApplication ranges:Immobilization and installation of the door frameInstallation and sealing of the window frameFilling, sealing and heat preservation of bathtub, bathroom ...