This Is Traditional Round Styrene Tubing. FEATURES: Used for Piping in Industrial Complexes or for Flat Car Loads Also used as Round Pylons in Bridges, Piers and Other Structures Precision Extruded in White Styrene Plastic INCLUDES: Six White Styrene Plastic Tubes SPECS: Outer Diameter: 5/16" (7.9mm) Inner Diameter: 1/4" (6.4mm) Wall: 1/32" (0.8mm) CJH 11/29/99 ir/jl