Reverse Chainring Bolt Set No More Boring Bike Is your bike lacking colors? You can always get anodized parts to make your bike pop. The Reverse Chainring Bolt Set comes with four 7mm bolts, four backing nuts, and four 2. 5mm spacers to mount your chainring. They are made from lightweight 7075 anodized aluminum and weigh just 9g. Features Includes: (4) 7mm bolts, (4) backing nuts, and (4) 2. 5mm spacers Material: Lightweight 7075 anodized aluminum Weight: 9g | Reverse Components | Reverse Chainring Bolt Set Blue | Aluminum