Original WGP (Bud Orr WOrr Game Products) compact on/off bottomline fitted inside a mountable cage. Has one 1/8in NPT hole and a bleed hole. Fits any standard 2-hole grip frame to provide a very low-profile tank mount. Easy-grip on/off adapter allows you to turn off the air flow of any standard pin-valve tank without unscrewing it (saves your tank o-rings!). Heavy chrome plated. Weighs only 3.5 oz. 2.25in x 1.5in x 1.25in. To install, take off the set screws on both side, pull the ASA out of the cage, mount the cage onto the frame, and then put the ASA back into the cage.