One of the best pressure switches on the market. 12 Volt systems only. 110 PSI comes on and 150 PSI shuts off. Moisture resistant, and tested to last over 10,000 cycles. Comes with 1/8″ male NPT port fitting. Leads are pre-fitted with insulated 1/4″ male push-to-connect terminals that are marked. Dimensions : 4.25″H x 2.25″W. Sold by each.