1. This bicycle fork washer, also known as a headset spacer, is made of aluminum alloy and is sturdy and durable. 2. It comes in a variety of specifications, including washers with different thicknesses such as 2mm, 3mm, 5mm, 10mm, 15mm, and 20mm, which can meet different fitting needs. Whether it's for fine - tuning the height of the bicycle fork or making personalized adjustments, these washers of different specifications can be useful, helping cyclists create a more suitable riding experience. 3. It has strong adaptability and can be compatible with a variety of bicycle models. Whether it's a bicycle for daily commuting or a vehicle for professional cycling, it can fit well. 4. It is a practical accessory for improving the performance and comfort of the bicycle, bringing more convenience and comfort to your ride.