This right here is a pro-grade tool for serious sealing and adhesive applications. It's a pneumatic (air-powered) caulking gun with a large 600ml capacity. The main body is made from refined aluminum alloy, so it's durable, wear-resistant, rust-proof, and still relatively lightweight. It's designed to be ergonomic and comfortable to hold, reducing fatigue during long jobs. It operates on a working pressure of 0 to 123 psi, with a thrust force of about 1.45KN. The package is pretty complete: you get the gun itself, a gas tube connector, 6 different nozzles, a seal sheet, sealing covers, a connection block, and a manual. It's built for heavy-duty use in industries like building decoration, solar panel installation, automotive work, and especially ship and container construction/maintenance – anywhere you need to apply a lot of sealant, adhesive, or paste quickly and efficiently. If you're in a trade that requires this kind of tool, this aluminum alloy caulking gun is a robust and reliable choice.