These are Round Solid Styrene Rod. FEATURES: Used for Bracing, Cabling, Piping, Wiring or Conduit Precision Extruded in White Styrene Plastic Ideal for all Facets of Model Building INCLUDES: Ten Round Styrene Rods SPECS: Actual Outer Diameter: .015" (0.4mm) Length: 10" (250mm) Instructions REQUIRES: Removing plastic film on outside of body after painting Polycarbonate Paint Body Scissors (DTXR1150) Body Reamer (HPIR9087) SPECS: Length: 22.25" (565.15mm) Width: 13.5" (342.9mm) at widest point Height: 7.25" (184.15mm) Thickness: .040" (1.01mm)