Check the listing for details. 20Pcs #41 Roller Chain Connecting Links 16mm Pitch Chain Master Links. Condition: New. Listed at 15.81 USD. Product Package: 20pcs #41 chain master links. Total Length: 0.82"/20.8mm; Pin Length: 0.6"/15.2mm; Pin Diameter: 0.14"/3.5mm; Inner Plate Depth: 0.39"/9.9mm; Pitch: 0.63"/16mm.Material: The chain links are made of carbon steel, precision machined, strong, and durable.Surface Shot-Peened: The standard chain end connector split links are shot-peened during the production process to improve the strength and toughness of the product and extend the service life of the chain.Easy to use: The links are easy to attach to the drive chain, making it easy to lengthen or shorten the chain; old sprockets can be removed with circlip pliers and removed from the chain. To install a new chain joint, first, insert the pin and snap the spring clip or cotter pin into place. Regular cleaning and lubrication can extend service life.