Tube Stock, UHMW Polyethylene, Grade Standard, Plastic Length Tolerance +/-0.250 in, Outside Diameter 2 3/8 in, Inside Diameter 1 3/4 in, White, Plastic Clarity Opaque, Shape Round Tubes, Impact Strength No Break, Friction Coefficient 0.12, Water Absorption 0.01 Percent, Plastic Hardness 66D