Victor 0690-0027 Internal Check Valve Repair Kit, Oxygen/Fuel, B RH 9/16”-18, 2 ValvesVictor 0690 0027 is an internal check valve repair kit used on Victor oxy fuel cutting and welding equipment that uses internal check valves. The kit includes two internal check valves and instructions, and is intended for servicing Victor torch handles and related equipment with internal check valve assemblies. It is commonly listed as compatible with Victor models including 100C, 315C, 315FC, 310C, 310FC, ST1000, ST1600, ST1700, ST1800, ST1900,