Alps Alpine SKTR 6.1mm Square Middle-Stroke Tactile Switches are middle-stroke-type tact switches that realize low operation sound and a clear operating feel. Alps Alpine SKTR Tact Switches feature 200,000 cycles of operating life (50mA, 16VDC), 3.8N operating force, and a 0.72mm travel. Applications include mobile, energy/industrial, gaming, and healthcare.