1.Quick Connect Coupler, S.Steel 201 2.SH, SM, PM, SF, PF 3.IMPA:351221- ... .A general purpose coupling which can close . Quick Connect Coupler, S.Steel 1.IMPA:351221-3514562. SH, SM, PM, SF, PF3. A ... which can close at either end of the connection.4.It is a convenient,compact coupling set which connects and disconnects ...