2 Pcs Mushroom Head 22mm Yellow Waterproof Metal Momentary Start Button Switch Item dimensions L x W x H: 1.31 x 1.34 x 1.31 inches 22mm momentary mushroom push button switch: press and hold to turn ON; release to turn OFF. Contact configuration: normally open, SPST (single-pole single-throw). Brand new push button switch with an aluminum head. Rated for a maximum of 250V AC/DC, 5A. Requires a panel hole size of 7/8 inch (22mm). Mushroom head diameter measures 1.34 inches (34mm). Suitable for application voltages including 5VDC, 12VDC, 24VDC, 36VDC, 48VDC, and 110VAC. Constructed from high-quality metal materials. Mechanical life expectancy is 1,000,000 cycles. Features IP65 waterproof protection, making it suitable for use in damp or dusty conditions. Simple installation with screw terminals, eliminating the need for soldering and enabling easy circuit connections. Package includes 2 push button switches. This switch is suitable for controlling LEDs and circuits in various applications such as cars, RVs, marine boats, trucks, household appliances, coffee machines, industrial equipment, and medical devices.