Check the listing for details. 30Pcs #25 Roller Chain Connecting Links 8.5mm Pitch Chain Master Links. Condition: New. Listed at 15.86 USD. Product Package: 30pcs #25 chain master links. Total Length: 0.44"/11.2mm; Pin Length: 0.35"/8.8mm; Pin Diameter: 0.09"/2.2mm; Inner Plate Depth: 0.22"/5.5mm; Pitch: 0.33"/8.5mm.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.