This listing is 1 Package of trippers  total 2 on 2 off These fit Most Intermatic Models Including T101, T102, T103, T104, T102-20 And T104-20 also for WH40 , T1900, T200, C8800, R8800, and T8800 series controls. Also See package for Dayton compatibility's, or ask me and I will email you the list.