Fox Float CTD rear shock for a Trek slash.   

8.25" x 2.375"

I have a lot of rear shocks for Trek bikes.   All shocks are from demo/test bikes with very little use, and are in excellent condition and fully functioning.   Condition varies from excellent to brand new.  

 I will not guarantee any hardware or an air valve cap (some have bushings and some don't, but either way you can reuse the ones on your frame).  Shock may have a non-original label or sticker in addition to the original Fox sticker.