The Dynarex DynaVac EMS Suction Canister (40/Case) (#4675) is a 1200cc Suction Canister that's designed to fit EMS vehicles. It features a self-sealing filter preventing backflow, as well as a foam guard to prevent premature shutoff. The pre-assembled lid on the suction canister includes a patient port with 20 degree angle to prevent tubing from kinking.