Function = 3/2 Closed, Monostable Thread Size = 1/4 Thread Standard = G Manufacturer 시리즈 = HEE-1/4-D-MIDI-24 Model Number p = 186515 The Festo retainer GR-H-QS-3-4 For mounting the one-way flow control valves with screws, series GR/GRO-QS-.. Materials note=Free of copper and PTFEMaterials note Free of copper and PTFE