Norgren pneufit c series fittings kits 4 amp 6mm 6 amp 8mm norgren ne11152 this 4 and 6mm handy fittings kit is designed for those involved with the creation and maintenance of compressed air systems the kit contains a selection of a wide range of fittings from the pneufit c series including straight connectors elbows t connectors hose connectors plugs etc norgren ne11152 pneufit c series 4 and 6mm fittings kit