Standard Pack = 1 piece(s). Featuring a metal valve and Aluminum cylinder, this extinguisher is designed to meet most commercial and industrial applications. Its seamless cylinder also comes with chip-resistant paint, and its handle and lever are made of pressed heavy-gauge metal for added strength. Checking the pressure is fast and easy, too, thanks to an at-a-glance gauge. This unit uses a non-toxic monoammonium phosphate agent that effectively fights Class A, B, and C fires. Part Number: 466227K