Compatible models - Compatible with T100 series models: 1A219, 1A220, 1A573, 1A850, 2A208, 2A209, 2EO21, 2EO22, 2EO23, 2EO25, 2E214, 2E258, 2E259, 2E351, 2E352, 2E353, 2E354, 4A213, 4EO23, 4EO24, 4EO25, 4EO26, 6X757, 6X759, 6X760, 6X767, 6X768, and 6X769. Installation purpose - Compatible with the for Intermatic T100 series, using 1 silver ON release and 1 Gold OFF release, also compatible with the for Intermatics clock: T101R, T101M, T104M, T104R, T101, T102, T103, T104 and 102-20, 104-20, for all other models: Use 1 silver ON trip and 1 gold OFF trip. Compatible with 156T3492A WH Series 156T1961A. Easy to install - Loosen the setting screw on the trip device, slide the trip device onto the timer dial, turn it on/off at the required time, then tighten the setting screw, making sure the time under the current time hand is correct. Wide range of applications - Our alternatives are not only suitable for the following time-switch release, but also for other indoor equipment as required. Simple and convenient, suitable for most models. Colour:Gold + Silver Material:Metal Package Contents: 5 x silver strip releectors 5 x gold strip releectors 10 x set screws