Size: each missing chain link size is 21 x 8 x 10 mm; The bike chain link is 21 mm in length, 8 mm in width and 10 mm in height;

Compatible with: because single/1 speed chain of bike width is 21 mm, so this missing link chain is compatible to all single/1 speed chain

⚡Military-Grade Stainless Steel Bike Chain Connector Link⚡Forged from corrosion-resistant stainless steel, these bicycle chain links withstand extreme riding conditions. Reinforced pin joints prevent deformation during high-torque pedaling, delivering long-lasting bicycle chain link repair performance

✨Tool-Free Bike Chain Link Installation System✨User-friendly bicycle missing links feature snap-lock mechanism allowing 3-second chain assembly/disassembly. Reusable bike chain connector links eliminate specialized tools - simply align, click, and ride with confidence

▲Complete Bicycle Chain Maintenance Kit▲Includes 12pieces (4 pairs) professional-grade bike chain links in compact storage case. Organized packaging prevents loss while cycling, keeping essential bicycle chain link repair components accessible during trailside emergencies