The White Industries headset spacers are specifically designed to cleanly match their headset bearing covers and top caps for a smooth and seamless look. Features: "Tapered" spacers are designed to go directly above the headset bearing cover (31.6mm to 34.7mm OD) "Straight" spacers are designed to go above the tapered spacers or on top of the stem (31.6mm OD) All spacers have a 28.6mm (1-1/8") internal diameter Includes: 2.5mm Straight Spacer 5mm Straight Spacer 10mm Straight Spacer 5mm Tapered Spacer 10mm Tapered Spacer