CHEMETRON QUICK CONNECT FITTINGS ARE GAS SPECIFIC AND CLEANED OF FOR PATIENT USE. THE CHEMETRON QUICK CONNECT IS TO BE USED FOR A SPECIFIC CHEMETON WALL OUTLET. THE OUTPUT SIDE OF THE FITTING COMES WITH 1/8" OR 1/4" MALE PIPE THREAD TO CONNECT TO A HOSE, FLOWMETER, OR MEDICAL GAS DEVICE.