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: 3/16" (4.8mm) Width: 1/4" (6.4mm) Thickness: 3/32" (2.4mm) Length: 6" (150mm)