Norgren pneufit c c0022 series stem union reducers norgren c00220604 a stem union reducer from the pneufit c range of metric push in fittings the reducer is ready to use straight from the box offering fast assembly without the need for tools suitable for use with pa or pur hose types 85 or 95 durometer norgren pneufit c c00220604 stem union reducerexpander 4mm to 6mm od