Item: Quick Express Couling Material: brass Type: French type Size: 3/8" , ... ", 1-1/4", 1-1/2" Gasket: NBR, Viton Item: Quick Express CoulingMaterial: brassType: French Thread: FemaleSize: 3/8" , 1/2 ... , and are not interchangeable with Geka and European air coupling. Quick Express Coupling