Plastic Tubing Pun-Cm-4-Sw Standard O.D Tubing, for Qs Plug Connectors, Polyurethane (Not Approved for Use In theFood Industry) Antistatic. Outside Diameter=4 Mm, Bending Radius Relevant for Flow Rate=17 Mm, Inside Diameter=2, 5 Mm, Min. Bending Radius=8 Mm, Tubing Characteristics=Suitable for Energy Chains In Applications with High Cycle Rates