Mushroom Push Button Switch 22mm Waterproof 1NO SPST Momentary Start Button Item dimensions L x W x H: 1.34 x 1.31 x 1.34 inches 22mm momentary push button switch: Press and hold to turn ON; release to turn OFF. Contact configuration: 1NO SPST. Brand new aluminum mushroom head push button switch. Rated for a maximum voltage of 250V AC/DC and a current of 5A. Mounting hole size required: 0.87 inches / 22mm. Brand new aluminum head push button switch. Maximum rating: 250V AC/DC, 5A. Hole size: 7/8 inch / 22mm. Mushroom head diameter: 1.34 inches / 34mm. IP65 waterproof protection enables use in damp or dusty conditions. Simple installation with screw terminals, no soldering required for easy circuit connections. Package includes: 2 push button switches. Suitable for controlling LEDs and circuits in automotive, RV, marine, truck, household, coffee machine, industrial, and medical equipment applications.