Astro Pneumatic (AP 405) Air Caulking Gun
* Permits smooth flow caulking Guns
* Dispense caulk, adhesives and sealants from standard cartridge
* Air Pressure: 40-69 PSI
* Tube Length: 8-1/4"
Great price, solid, simple, have not had any trouble with it.Hand Caulking Guns Have used it for about 6 months with NP1 polyuerathane caulk. All metal construction. Just push the trigger up from the bottom, it feels more natural anyway, and it won't pinch you. Use your brain and don't be a baby.