Features: With this adapter, you can easily convert your crankset to 140BCD ,either 110BCD or 130BCD. Make from aluminum alloy, this crank tooth plate transfer sleeve ensures longevity and resistance to wear. The efficient design of this transfer sleeve facilitates smooth pedaling, enhancing your cycling experience. Whether you prefer a single chainring setup or a double chainring setup, this adapter works for both configurations. This chainring crank adapter is specifically designed to fit for crankset, ensuring a seamless installation. Specifications: Component: Aluminum alloy Size: about 14.5x14.5cm/5.71x5.71inch Center Distance of Diagonal Screw Holes: about 10.4cm/4.09inch Color: Black/02/01/Metal Color Type: to 104B 110 130 Package Includes: 1pc Mountain Bike Crank Arm Adapter note: Please allow 1-2cm errors due to manual measurement, make surely that you not mind before order. Due to difference between different monitors, the picture may not reflect the actual color.