Size: Each missing chain link measures 20 x 5.5 x 7 mm. The bicycle chain link is 20 mm long, 5.5 mm wide and 7 mm high; The missing link model: CL555. Compatible with: Since the width of the bicycle's 11-speed chain is 5.5 mm, this missing link chain is compatible with all 11-speed gears. Durable material: The missing link is made of sturdy stainless steel and is suitable for long-term use. Easy to use: These bicycle chain links can be used repeatedly and are easy to assemble and disassemble. Suitable for mountain bikes and road bikes. Quantity: 3 pairs of stainless steel chain links, 6 pieces in total; Well packaged in a bag, convenient to carry and not lose. Durable: The link of the bicycle chain is made of stainless steel and is durable. These bicycle chain connectors can be repeated and are easy to assemble and disassemble. How to confirm whether to apply to your bike How many parts of the variable gear on the rear derailleur flange, how fast does the chain fit on the link? Dimension: 11-way missing link: The link model is CL555, each link is 20 mm long, 5.5 mm wide and 7 mm high. Application: Since the bicycle's 11-speed chain is 5.5 mm wide, the 11-speed missing link chain is suitable for all bicycles. Specifications for 11-speed chains: Material: Stainless steel Color: Silver Quantity: 3 pairs Link model: CL555 Link size: 20 x 5.5 x 7 mm Package includes: 3 pairs of speed chain links (6 pcs) Note: Please check your bike width and chain model before ordering this bike link.