Bend pulleys, 4.5/6 inch design: return belt driven pulley provides rotation for shaft-driven speed sensors. Available in 4.5 inch or 6 inch diameter. Size: 6 inches diameter Belt width / A dimension: 24″, A=33″ (839 mm) to 35.5″ (901 mm) Finish: standard, polyester painted mild steel Bearings: Imperial size .