The Raypak High Limit 135F Auto Reset - Surface Mount, part number 006725F, is a crucial replacement component for Raypak pool heaters, including models R185A, R265A, R335A, and R405A. This surface-mounted thermostat features a durable silver button sensor with two spade wire connectors and a red dot indicator, ensuring reliable temperature control up to 135 degrees Fahrenheit. It's designed for seamless installation with included screws, enhancing the efficiency and safety of your heating system. Ensure optimal performance of Raypak RP2100 series heaters with this high-quality replacement part.