Tube Stock, PVC Type 1, Grade Standard, Plastic Length Tolerance Oversized/-1.000 in, Outside Diameter 1 in, Inside Diameter 1/2 in, Gray, Plastic Clarity Opaque, Shape Round Tubes, Impact Strength 1.0 ft-lb/in, Friction Coefficient 0.6, Water Absorption 0.2 Percent, Plastic Density 0.051 lb/cu in, Plastic Hardness Rockwell R115