Because details matter when tricking out your bike, don't stack spacers- buy the right size instead! Introducing the mate to our beautiful stem caps, the Wolf Tooth headset spacers are precision machined in Minneapolis, Minnesota. Spacer Kits come in your favorite anodized color options and in the lengths of 3mm, 5mm, 10mm, 15mm, 20mm, 25mm, and 30mm options as well as bundled with Wolf Tooth's lightweight stem cap and bottle cage bolts.Compatibility: 1 1/8" top (straight 1 1/8" or 1 1/2" to 1 1/8" taper) steer tubes only Tech Specs: Design and manufactured by Wolf Tooth in Minneapolis, MN USA 1 1/8" top (straight 1 1/8" or 1 1/2" to 1 1/8" taper) steer tubes only 6061-T6 Aluminum 3mm, 5mm, 10mm, 15mm, 20mm, 25mm, 30mm Colors - red, black, orange, blue, gold, purple, silver, green Weight: 3mm - 2g , 5mm - 3g, 10mm - 5g, 15mm - 7g, 20mm - 9g, 25mm - 11g, 30mm - 13g