OD 4mm 5mm 6mm 8mm Stem ,Pneumatic brass Silencer Air Muffler can be directly installed in to push fitting or hose

these are made to fit directly into a push fit connector.

however they can be used Directly in to Pu Hose by heating the hose in hot water

4mm fits 6mm hose
6mm fits 8mm hose
8mm fits 10mm hose