1.Quick Connect Coupler, S.Steel 201 2.SH, SM, PM, SF, PF 3. ... 4.A general purpose coupling which can close . Quick Connect Coupler, S.Steel 1.IMPA:351221-3514562. SH, SM, PM, SF ... set which connects and disconnects easily,providing dependable service for fluid transfer of hydraulic,pneumatic,and vacuum systems.Pls check the ...