Helico Hose End Quick Coupler ( With Ferrule ) Size:1-1/2'' to 4'' Gasket: NBR, EPDM, Vition ... Helico Hose End Quick Coupler ( With Ferrule )Size: From 1-1/2'' to 4''Gasket: NBR, EPDM ... ,Agricultural irrigation and other fields. > Aluminum Guillemin Quick Coupler With Ferrule