Features 1、Headset Cover: Aluminum alloy cover is good for dustproof and waterproof to extend the durability and guarantee the quality. 2、44mm Bicycle Headset: Semi concealed headset has high performance, integrated semi bearing sealed structure, super lubricity and wear resistance. 3、Durable Material: Headset is made of aluminum alloy heightened upper cover, steel headset, and tight ring, which is rust proof and durable. 4、Use Purpose: Can prevent excessive wear of the bearing and make it rotate freely. Fine processing ensures smooth surface and perfectly fit with the bicycle. 5、Headset Parameters: Applicable inner diameter: Approx. 44mm/1.7in, inner diameter of upper and lower headset ring: Approx. 44mm/1.7in. Applicable front fork diameter: 28.6mm/1.1in. Item Type: Bike Bearing Headset Color: As Pictures Shown Material: Aluminum Alloy + Steel Weight: Approx.141g/5.0oz Applicable Front Fork: Diameter: 28.6mm/1.1in Application: Inner Diameter: Approx. 44mm/1.7in, Inner Diameter of Upper and Lower Headset Ring: Approx. 44mm/1.7in Package List 1 x Upper Headset 1 x Lower Headset 1 x Front Fork Low Gear 1 x Headset Cover 1 x Star Nut Headset Cover Set