This is a A-CL100M Metric Connecting Link w/ Spring Clip PN: CL100MMain Description As Following : A-CL100M Metric Connecting Link w/ Spring Clip P.N: CL100M 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