8 Sets of 156T1978A Replacement Trippers Kit Compatible with Intermatic T100 Series Clock Dial Trippers Timers T101, T102, T103, T104, 102-20, 104-20 etc (8 ON / 8 Off) Replaces Part Number: 156T1978A Product Information: Product Includes 8 silver ON trip unit and 8 gold OFF trip unit With 16 Screws. By using the replacement trippers kit, you can precisely adjust the timer's on and off times Trippers Kit compatible with Intermatic T100 Series Clock Dial Trippers Timers T101, T102, T103, T104, 102-20, 104-20, T101R, T101M, T104M, T104R. Trippers Kit Also fits following Trippers Timers 1A219, 1A220, 1A573, 1A850, 2A208, 2A209, 2EO21, 2EO23, 2EO22, 2E214, 2EO25, 2E25, 3E25, 35E3, 4EO24, 4EO26, 4EO25, 6X757, 6X759, 6X760, 6X768, 6X767 and 6X769. Note: Please loosen the set screw on the trip device, slide the trip device onto the timer dial, perform the on or off action at the desired time, and then tighten the set screw. Please make sure the correct time is under the current time pointer.