Campagnolo Record CS4-REX23 12-23t 10-Speed Road Bike Cassette. Brand/Model: Campagnolo Record CS4-REX23 Compatibility: Campagnolo Cog Range: 12 Tooth-23 Tooth Condition: At CyclingUpgrades we classify our cassettes into the following classes: New/New-Other: Includes new, new without box, and new take-off cassettes. Light Wear: Light wear and usage, little to no chain groves on the sides of the cogs, item appears to…