DUO plastic tubing PUN-6X1-DUO-BS Standard O.D tubing, for QS plug connectors, CN and CK polyurethane fittings (not approved for use in the food industry). Outside diameter=6 mm, Bending radius relevant for flow rate=26,5 mm, Inside diameter=4 mm, Min. bending radius=16 mm, Temperature dependent operating pressure=-0,95 - 10 bar