SharkBite U850G50 PEX Tubing, 1/4-Inch (3/8 O.D.) by 50-Feet 50' cross-linked polyethylene coil tubing 1/4" (3/8" OD) Made without an oxygen barrier for potable water systems Repeating SharkBite imprint pattern provides a visual aid to determine if the tube has been inserted all the way into the SharkBite Push-Fit Fitting Color: White