Review on Carbon Fiber Bike Headset Spacer Set - 11 Pieces, 🚲 7 Sizes (1-1/8 Inch, 20mm, 15mm, 10mm, 5mm, 3mm, 2mm, 1mm) by Stephen Ball

Love the look of these spacers - and the variety of sizes that are mailed. I had an issue where the spacers were too thick to fit properly between the stem and bar mount. For most people this isn't a problem as you usually don't need spacers on top of the handlebar mount, only underneath. In my case, I bought a Delta Pro Long Edition stem and tried different handlebar heights to find the most comfortable fit. It's a good value - just note that they're a bit thicker than most aluminum spacers - in case that might affect your setup.