This is a A-MB04 Bushing, Machine 5/8" X 1 1/8" 18 Ga. (Narrow Rim) PN: MB04Main Description As Following : A-MB04 Bushing, Machine 5/8" X 1 1/8" 18 Ga. (Narrow Rim) P.N: MB04 Gauge: 18Inside Diameter: 5/8"Outside Diameter: 1 1/8" Crossed From: BR10L , Found in Section & Models : Shop Supply > Machinery Bushings, (Miscellaneous) (UNDEFINED): SEVERAL Associated Items : New Also This is An Aftermarket Product And : Gauge: 18 Inside Diameter: 5/8" Outside Diameter: 1 1/8"