"MRC CQGM IS BURST PRESSURE OF TUBING, MAX WORKING PRESSURE VARIES WITH TUBING USED; 1ST END OF FITTING IS A QUICK CONNECT-DISCONNECT TYPE FITTING, TUBING IS PUSHED INTO THE FITTING TO CONNECT, TO DISCONNECT HOLD DOWN ON INSERT WITH TWO FINGERS AND PULL TUBING OUT; COMES WITH BUNA-N O-RING; SIMILAR TO NSN 4730-21-914-3820."