Features1Aluminum alloy material, lightweight design, anodized, corrosion-resistant. 2Can be paired with SCG03/05 SingleDisc chain guides. When installing the vertical direction port, it should be perpendicular to the horizontal plane. 3Applicable specifications: 5way width 68/73 frame, and BSAthreaded CenterAxle, Ximano BB50/BB51/BB70 CenterAxle can be installed, and speedcoupling GXP can also be installed (the 5-way CenterAxle should be an ExternalHanging type, and pressed in and embedded CenterAxles cannot be used). 4Easy and convenient to install.SpecificationThis bike accessory is designed to securely hold your bike's chain in place, reducing the risk of chain derailment and ensuring smooth and efficient gear shifting. Made from aluminum alloy materials, it is built to withstand the rigors of intense Cycle, providing long-lasting performances.Features:Aluminum alloy material, lightweight design, anodized, corrosion-resistant.Can be paired with SCG03/05 SingleDisc chain guides. When installing the vertical direction port, it should be perpendicular to the horizontal plane.Applicable specifications: 5way width 68/73 frame, and BSAthreaded CenterAxle, Ximano BB50/BB51/BB70 CenterAxle can be installed, and speedcoupling GXP can also be installed (the 5-way CenterAxle should be an ExternalHanging type, and pressed in and embedded CenterAxles cannot be used).Easy and convenient to install.Specifications:Color: blackMaterial: aluminum alloyItem size: 70 * 68 * 4mm / 2.8 * 2.7 * 0.2inItem weight: 19g / 0.7ouncePackage size: 80 * 80 * 10mm / 3.1 * 3.1 * 0.4inPackage weight: 58g / 2.0ouncePacking List:1 * Bike Chain Guide Adapter9 * Screws6 * Stainless Steel Washer1 * WrenchPackage List1 * Bike Chain Guide Adapter9 * Screws6 * Stainless Steel Washer1 * Wrench