Features： 1、Aluminum Alloy: Made of high quality aluminum alloy material, the bicycle headset is light in weight and not easy to deform, and can be used for a long time. 2、High Strength Star Nut: The steel headset star nut is lightweight, of high strength and long service life, which is a bicycle headset accessories. 3、Double Bearings Headset: The upper and lower double bearing structure of the headset is smooth and unimpeded, effort saving, and can well protect the headset. 4、Product Application: The headset is suitable for ordinary straight fork tube. With 34mm/1.3in outer diameter, it is suitable for head tube with 34mm/1.3in inner diameter. 5、 Bike Accessories: The bicycle headset is easy to install, which is a useful accessory for replacing old headset of bike, making riding more labor saving and highly efficient. Specification： Item Type: Bicycle Headset Material: Aluminum Alloy + Steel Product Weight: Approx. 120g / 4.2oz Application: Suitable for ordinary straight tube front fork Package List： 2 x Bearing 1 x Headset Star Nut Top Cap Set 1 x Upper Compression Ring 1 x Upper Headset  1 x Low Headset 1 x Low Cover 1 x Top Cover