GLSJA 16 Pcs Bike Carbon Fiber Headset Spacers Kit - 1mm/2mm/3mm/5mm/8mm/10mm/15mm Aluminum Spacer Rings with Black Oval Caps + Decorative Washers + Bolts (for MTB/Road Bikes, Cycling Enthusiasts)

["【Full Compatibility】Package includes 4x1mm + 2x2mm/3mm/5mm/8mm/10mm/15mm precision-machined spacers, allowing 2-40mm stack height adjustment to fit most bicycle stems (31.8mm/28.6mm).","【Complete Accessories】Comes with 2 Pcs black caps, 2 headset top cap,2 PCS headset star nut,2 PCS bolt provide various combination to adjust height of handlebars to fit your riding style - everything for professional installation.","【Weight Optimized】High-density woven carbon fiber, it offers superior strength and lighter weight compared to aluminum alloy headset spacers.","【Tool-Free Installation】Precision 45-degree chamfer edges and 0.01mm tolerance ensure smooth sliding fit.","【Wide Application】Compatible with all 1-1/8inch (28.6mm) front stem forks. it fits all modern performance bikes, including MTB, road, cruiser, and electric bikes."]