This two-piece trap is constructed using a 57 mm O-ring flat flange. The lower trap body is 57 mm O.D. x 300 mm for use with a 4300 ml Dewar flask. The arms on stopper portion have #20 O-ring joints for connection to an AF-0300-03 manifold and AF-0300-06 shut off adapter. The complete item consists of the trap body and stopper, one CG-139-02 horseshoe clamp, one CG-305-331 #331 Viton® O-ring and two CG-305-214 #214 Viton® O-rings.