Specification: Road Mountain Bicycle parts are made of Carbon Steel, durable and practical for most bikes The short release lever for front wheel, hollow shaft size: approx.11cm / 4.33in, quick release: approx.16cm / 6.3in The long release lever for the rear wheel, hollow shaft size: approx. 14.5cm / 5.7in, quick release: approx. 19cm / 7.48in Usually the axels fit 20" 22" 24" 26" 28" bike, work on a 6 7 8 speed road bike Weight: approx. 255g / 8.99oz Color: black Package List: 1 * Short Hollow Shaft 1 * Short Quick Release 1 * Long Hollow Shaft 1 * Long Quick Release