Check the listing for details. 10PCS 1/2" Pitch #40 Chain Offset Half Link Roller Carbon Steel. Condition: New. Listed at 15.20 USD. Chain Connector Half Link RollerGeneral Information：[1]Note: Please pay attention to the size and model before ordering.[2]Material: Made of carbon steel materials, finely processing, precision processing, strong, anti-oxidation, and durable.[3]Appliance: This chain link roller connector is Easy for drive chains. Regular cleaning and lubrication can extend service life.[4]How to Use: You can use appropriately sized circlip pliers to take apart the old chain link roller and remove it from the chain. To install the new chain joint, insert the pin first, then snap the spring clip in. Wear gloves carefully for safety.[5]Specifications: Chain No.: 08A(#40); Total Length: 23.8mm / 0.94-inch; Roller Diameter: 7.92mm / 0.31-inch; Pin Length: 17.75mm / 0.7-inch; Pin Diameter: 3.96mm / 0.16-inch; Inner Plate Depth: 12mm / 0.