Mr. Gears Timing belt pulleys plus pulley stock are available in several pitches, .080, .0816, .40DP, .200, .375, and .500. Timing belt pulleys are available in aluminum alloy - clear andodized or gold anodized - complete with set screws, steel with black oxide finish, aluminum Alloy with plain or hard anodized finish. Silent drive, use in systems with variable center distance. Machine hobbed usable lengths in 8", 10" or 12", available in aluminum alloy, carbon steel (both suitable for hardcoating), and plastic materials. Uniroyal mini pitch available in aluminum alloy gold anodized or black anodized for belts up to 1/4" and 3/8" wide. Also aluminun alloy suitable for hardcoating.  * Flanges (Dish formed Aluminum Alloy or Steel) and Belts are available in all pitches and made from a variety of different types of materials.