Check the listing for details. 5pack #100 Chain Connector Link Roller 1 1/4" Pitch Carbon Steel for 20A Chain. Condition: New. Listed at 23.85 USD. Specifications: Chain No.: 20A(#100); Total Length: 57mm / 2.24-inch; Roller Diameter: 19.5mm / 0.77-inch; Pin Length: 43.4mm / 1.71-inch; Pin Diameter: 9.35mm / 0.37-inch; Inner Plate Depth: 30.1mm / 1.19-inch; Pitch: 1 1/4-inch / 31.75mm; Width Between Inner Plates: 18.9mm / 0.74-inch; Average Tensile Strenght:109.2kN; 5 x Connector Link RollerMaterial: Made of carbon steel materials, finely processing, precision processing, strong, anti-oxidation, and durable.Appliance: This chain link roller connector is Easy for drive chains. Regular cleaning and lubrication can extend service life.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.