Deck Roller / Simplicity 1678914Pack Size:1Simplicity 1678914SM, Simplicity 1678914NHC 226-0543, Ratio Parts 31-052, Sunbelt B1WL57Simplicity 616, 620, 720, 4040, 4041 and 9020 Power MaxBore: 5/8 ", Tread: Smooth, Wheel Size: 2 3/4, Hub: 8 5/8 "