Our tubing features a heavier wall than the usual 3/8" ID x 1/2" OD tubing sold by most. 50' Coil. 3/8" ID x 9/16" OD. Made in the USA. Food Safe. FDA Compliant. Formulated to comply with FDA, Prop. 65, RoHS, and REACH requirements, as well as being non-toxic, BPA free, and non-phthalate, this clear, flexible, lightweight tubing provides full-flow viewing and is ideal for handling liquids. Our clear PVC tubing is manufactured here in the USA. Constructed using polyvinyl chloride (PVC). Durometer: 80 Shore “A”. Operating temperature range from +25° F to +150° F (Higher temperatures will result in lower working pressures)