The Model BT2 filtration system is a dual canister assembly. The canister bowls are made of stainless steel with brass heads and come with manual drains. Both filter elements are disposable after use. The first stage element is a coalescing filter (BT RWS-5) and the second stage is a activated charcoal filter (BT MS97AC). The unit is supported by an aluminum frame with rubber feet. Description Standard Unit Specifications: One air inlet, #10-JIC Two air outlets (O2), 1/2” ball valves 0-300 Stainless steel outlet gauge Brass plumbing Stainless steel hardware Weight & Dimensions (approx.):Weight: 20 LBS Length: 21” Width: 13.25” Height: 18.5” Element Specifications First Stage: RWS-5 Particulate Filter (5 micron) Second Stage: MS97AC Charcoal Filter Product Sheet