The ASV series of speed exhaust controller is available in two styles depending on size. The ASV120F/220F are elbow styles that look like a standard speed controller. The ASV310F~510 are a tee-type design with twice the flow capacity of a standard speed controller and also add flame resistance for use in welding applications.,Available tube connections: 5/32", 1/4", 5/16", 3/8", 1/2", 4mm, 6mm, 8mm, 10mm, 12mm,Available threaded connections: M3 x 0.5, M5 x 0.8, 10-32 UNF, R1/8, R1/4, R3/8, R1/2, NPT1/8, NPT1/4, NPT3/8, NPT1/2,Spatter covers available (ASV310F/410F/510F)