PrimoFlex Advanced LRT 3/8in. ID x 5/8in. OD Tubing Bundle (10ft pack) - Atomic UV Green Limited Edition Trusted/ExperiencedBrand (PrimoFlex LRT) Glass-like transparency (Clear LRT) / Logo Free (no print on tube) Inner Wall resilience Inner Diameter:3/8 inch / Outer Diameter:5/8 inch Environmentally responsible, safe and non toxic product