Our headset spacers are specifically designed to cleanly match our headset bearing covers and top caps for a smooth and seamless look. They are available in sets and individually. Details: - White Industries spacers are compatible with other headsets but not necessarily other headset spacers due to the smaller outside diameter of our spacers (see specs below) - "Tapered" spacers are designed to go directly above the headset bearing cover - Sets include 1 each of: 2.5mm straight (S2.5), 5mm straight (S5), 10mm straight (S10), 5mm tapered (T5), 10mm tapered (T10) Specs: - Tapered spacers are 31.6mm outside diameter on top and 34.7mm outside diameter on the bottom - All spacers designed to fit a 1-1/8" (28.6mm) fork steerer