These are Round Solid Styrene Rod. FEATURES: Used for Bumpers, Building Trim, Recessed Conduit Precision Extruded in White Styrene Plastic Ideal for all Facets of Model Building INCLUDES: Ten Quater-Round Styrene Rods SPECS: Actual Outer Diameter: .030" (0.8mm) Length: 10" (250mm) Width: .030" (0.8mm)PlastructPart PLS90891