This is a A-MB11 Bushing, Machine 1 1/8" X 1 3/4" 18 Ga. (Narrow Rim) PN: MB11Main Description As Following : A-MB11 Bushing, Machine 1 1/8" X 1 3/4" 18 Ga. (Narrow Rim) P.N: MB11 Gauge: 18Inside Diameter: 1 1/8"Outside Diameter: 1 3/4" Replaces: MB52 HARDWARE , Crossed From: BR18L , 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: 1 1/8" Outside Diameter: 1 3/4"