TRIWONDER BICYCLE HEADSET SPACERS Go outside and be close to the nature is that why TRIWONDER exists. Outdoor is the pursuit of adventure with the whole body to relax, and our bike headset spacers aim to provide convenience and safety for your outdoor adventures. Just enjoy your journey and we'll become your backing. Be your partner, be your armor. Aluminum Alloy Spacers Package: 12 PCS bike handlebar spacers in 3 sizes, 2mm / 5mm /10mm, 4 PCS each size. Bicycle headset spacers threadless are made of black anodized aluminum alloy material with smooth surface and exquisite workmanship. Comes anodized in Black, colorfast surface, ultra precision diamond blade machine cut, fit all road /mountain bikes. Carbon fiber Spacers Package: 12 PCS bike handlebar spacers in 4 sizes, 2mm / 3mm / 5mm /10mm, 3 PCS each size. Automatic cutting, smooth edge, fit most of the road bicycles, delicate texture and durable to use. Multi-size for you to adjust the appropriate height, small size of spacer headset let you have a more precise height adjustment.