Check the listing for details. 10Pcs 1/2" Pitch #40 Chain Offset Half Link Roller, for 08A Chain Carbon Steel. Condition: New. Listed at 15.53 USD. Chain Link Roller ConnectorProduct Details1.Appliance: This chain link roller connector is Easy for drive chains. Regular cleaning and lubrication can extend service life.2.Material: Made of carbon steel materials, finely processing, precision processing, strong, anti-oxidation, and durable.3.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 / 0.47-inch; Pitch: 1/2-inch / 12.7mm; Width Between Inner Plates: 7.85mm / 0.31-inch; Average Tensile Strenght:17.5kN; 10 x Connector Offset Half Link Roller4.How to Use: You can use appropriately sized circlip pliers to take apart the old chain link roller and remove it from the chain.