This listing is for one SL1-PK travel limit switch from the SL1 series, featuring a roller-lever actuator for reliable mechanical travel detection. The compact roller lever design provides a positive switching action when a machine component reaches its travel limit, commonly used in industrial control and automation systems. The SL1-PK designation appears in supplier and distributor references as part of the SL1 family; availability for some variants may be limited. Verify model fitment with your equipment prior to purchase to ensure compatibility.