DESCRIPTION:  RANT BANG UR "MID" BB KIT 19mm. Color: Black. Item is brand new and never used or mounted and comes in the original packaging. The Rant Bang Ur BB kit includes 2 precision R12 sealed bearings, 2 CNC machined 6061 aluminum cone spacers for a clean look, an aluminum internal spacer, 4 steel crank arm spacers for dialing in your chain alignment. R12 Sealed bearings. 100% CNC 6061-T6 alloy cones. Include spacers for custom fit. Weight: 5.5 oz. If you aren't sure if this MID bb kit will work with your frame, send us an email ("ask seller a question") with your frame make, model, and aprox year it was manufactured, and we should be able to confirm it for you. All sales are final, no refunds, no exchanges, an no returns. Thank you.