This is a A-OL100M Metric Offset Link w/ Cotter Pin PN: OL100MMain Description As Following : A-OL100M Metric Offset Link w/ Cotter Pin P.N: OL100M Used W/ RCKE11434 Metric Roller ChainPitch: 1 1/4" / 31.75 MMWidth: 3/4" / 19.56 MM Found in Section & Models : Chains/ Sprockets/ Pulleys/ Hubs > Metric Roller Chains and Attachment Links, (Miscellaneous) (UNDEFINED): SEVERAL Associated Items : New Also This is An Aftermarket Product And : Used W/ RCKE11434 Metric Roller Chain Pitch: 1 1/4" / 31.75 MM Width: 3/4" / 19.56 MM