Fits ALL Sunbeam Twinblade Twin Discharge Mowers.(Grass Drops Front & Back of Machine) Two used on Each Blade Shaft, i.e. 4 Per Mower. Model #'s RE18, RE181, RE182, RE183, RE184, RE185, RE18ST, RE18DS. Most #'s can be followed by a -A, -B, -C, -1, -2, or Belts will be Marked 47-81752 ALL 47-81752-1 BELTS are Subbed 47-81752. Remove Spring filler on Motor Drive. *********************************************************** Bushing Specs: In Inches: Top Diameter 3/4", Bottom Diameter 5/8" and Height is 3/4". Inside Dimension BEFORE Pressed into Deck is 7/16". These are a Genuine Factory Bushings & require this Exact size to give you best service.*******************************