Conical Aluminum 10mm Cycling Road Bicycle Fixie Bike Headset Spacer - Green Made of durable and lightweight aluminum Suitable for road bikes, BMX bikes, mountain bikes, fixies bikes, track bikes, single speed bikes etc Fits for 1-1/8" (28.6mm) stem Height (mm): 10 Diameter (mm): 29.2;Package includes:- Headset Spacer x 1;Weight (g): 19