This is an Open Web Truss Warren Style-2. FEATURES: Used for Roof Trusses, Bridges, Conveyors, and Space Frames Precision Molded in Dark Gray ABS Plastic Ideal for all Outdoor or Plastic Models INCLUDES: Two Open Web Trusses in ABS Plastic SPECS: Height: 1/4" (6.4mm) Width: 3/8" (9.5mm) Thickness: 1/8" (3.2mm) Length: 6" (150mm)