1、Compatible Models: Through the conversion of the reducer ring, it can be compatible with different brands of cranksets, 24‑24MM: crankset, for Prowheel, etc., 24‑22MM: for SRAM, for GXP, etc. 2、Ceramic Bearings: Using ceramic sealed bearings, 360 degrees rotation, high accuracy and speed, precisely nesting into the bottom bracket or shaft, slippy and free. 3、Premium Material: Aluminum alloy frame and ceramic bearing, pedal smoothly, reduce noise, light weight while maintaining strength, precise machining to increase service life. 4、Integral Sealed: Extended service life, integral sealed, XT grade high strength center shaft sealed with good performance, retains the lubricant in the bearing, good dustproof and waterproof effect, suitable for harsh riding environments. 5、Precise Machined Thread: High strength aluminum alloy, strengthens lateral stability, is not easy to loosen, and rejects abnormal noise. It is made of high strength aluminum alloy with T6 heat treatment. The CNC process is light in weight and still maintains high strength. 6、Washers: Three fine adjustment washers, adjust the chain center line distance of the crank ring for customer convenience. Item Type: Mountain Bike Sealed Center Axle Material: Aluminum Alloy, Ceramic Gross Weight: 98g / 3.5oz Adaptation: five way length Approx.86-92mm / 3.4-3.6in Compatible Models: through the change of diameter ring, it can be compatible with different brands and models of tooth disc, 24-24MM: crankset, for Prowheel, 24-22MM: for SRAM, for GXP, etc. 1 x Press in Center Axle 1 x Reducer Ring 3 x Washer