Office Products" /> Multiple barbs per arm provide additional contact between the fitting and the tubing for extra gripping power Ensure a tight, secure connection between lengths of tubing having the same inner diameter (I.D.) Chemical-resistant polypropylene plastic for use with a wide range of liquids or gases grade for direct contact with food, drugs, and cosmetics; autoclavable Accepts 3.2mm (1/8") tubing I.D.