Features： 1、Front quick release lever is 130mm / 5.1in and the rear quick release lever 170mm / 6.7in (diameter 5mm / 0.2in) is easy to use and can help quickly remove the bicycle wheel. 2、Front seal bearing has 2 sealed bearings, the rear seal bearing has 4 sealed bearings, 32 strip holes, 6 claws, 108 rings (Applicable for XD&HG 8‑11 speed tower base). 3、Shell is made of high‑quality chrome steel material and aluminum alloy 7075, which is durable. 4、Easy to use, without any professional requirements even though you are an amateur. 5、Fine craftsmanship and strict manufacturing techniques make it more durable. Specification： Item Type: Bike Hub Bearing Material: Aluminum Alloy 7075 (Shell) + Chrome Steel (Shaft) Quick Release Lever Size:  Front Lever Length: Approx. 130mm / 5.1in Rear Lever Length: Approx. 170mm / 6.7in Diameter: Approx. 5mm / 0.2in Weight: Approx. 727g / 25.6oz Strip Hole: 32 Holes Freewheel Body: 6 Claws and 108 Ring (Applicable for XD&HG 8-11 Speed Freewheel Body) Regulation: 14G Front Seal Bearing: 2 Rear Seal Bearing: 4 Package List： 2 x Hub 2 x Quick Release Lever