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: 4,5 inches diameter, self cleaning Belt width / A dimension: 48" / A= 55 ... 59.5" (1 397 ... 1 511 mm) Finish: standard, polyester painted mild steel Bearings: Imperial size .