Features： 1、Aluminum Alloy: Using high quality aluminum alloy material, the bicycle headset is light in weight and not easy to deform, ensuring a long service life. 2、High Strength Star Nut: Steel headset star nut, which is light in weight and of high strength and long service life, it is a headset accessories. 3、Double Bearing Structure: 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 44mm outer diameter, it is suitable for head tube with 44mm inner diameter. 5、 Replacement: Easy to assemble and reliable to use, it is a great headset replacement for your bike, making riding easier and more enjoyable. Specification： Item Type: Bicycle Headset Material: Aluminum Alloy + Steel Product Weight: Approx. 110g / 3.9oz Application: Suitable for ordinary straight fork tube Package List： 2 x Bearing Headset 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