The Momentary Air Switch SPNO is a control switch commonly used in spa systems to activate sequential or multi-function switches. With a Single Pole, Normally Open (SPNO) design, it provides momentary contact, meaning it only activates when pressed. It operates at 3 Amps and features a 1/8" center spout for the air tube, with a 9/16" hole size for easy installation. This air switch is an essential component for controlling various electrical devices in spas, ensuring safe and convenient operation from a distance.