These are the same as in the Extra 300 and CAP 232 kits, made of beautifully-formed light fiberglass with white gelcoat. Use as replacements for those kits, or to fit almost any model in the 300 to 480 (10e - 15e) class, or for your own hand-built models. Weight each: 4.9g, Length: 115mm, Height: 35mm. Fits wheels from 30mm to 45mm (1 1/4" - 1- 3/4") in diamter and up to 13.2mm wide (1/2"). Fits wheels up to 50mm (2") in diamter and up to 13.2mm wide (3/4").