Waffen 22mm BMX Sealed Bearing Bottom Bracket:CNC machined alloy cups and flush bearing covers, with big, burly, high quality sealed cartridge bearings.Sliding axle system with spacers to allow a variable chainline. (Axle not included.) Waffen BMX BB system for 22mm axles.(also compatible to most other similar sliding 22mm axle crank systems.) Weight 240g (inc. spacers)BMX BB Features;Precision CNC machined alloy cups.Variable, sliding chainline.2 large replaceable industrial cartridge bearings.CNC machined flush fit bearing covers.