This is Fineline Styrene Rectangle Tubing.FEATURES: Used with Concrete Columns in the Construction of Modern Structures Precision Extruded in White Styrene Plastic Ideal for all Facets of Model BuildingINCLUDES: Five Rectangle Styrene TubesSPECS: Height: 5/16" (7.9mm) Width: 1/4" (6.4mm) Wall: .025" (0.6mm)PlastructPart PLS90632