3010P Tecmark 3000 Series pressure switch is rated at 25 amps, SPNO and 2 terminal. The thread is 1/8" NPT which is the standard used. This pressure switch is a great replacement for most 25amp pressure switches, and due to its non-metal structure will not oxidize or rust. It is perfect for salt water & high moisture areas. The 3010p can also be used as a replacement for the 3029 & 3029p.