Type S magnetic contactors and starters are for motor control applications. 8903S lighting contactors are for lighting control applications. Type S contacts are easily replaced. This extends the life of the NEMA Size 3 contactor or starters or 100A lighting contactor. This replacement contact kit is for 2 pole 8502SE contactors, 8536SE starters and 8903SQ lighting contactors. Kit includes the movable and stationary contacts and needed hardware for 2 poles.