Reverse Acting Temperature Regulator, Connection Type FNPT, Pipe Size 2 in, Max. Range 45 Degrees to 140 Degrees F, Sensor Dia.,2 In,20 psi Pressure 20 psi, Sensor Length 19 in, Overall Height 15 11/16 in, Overall Width 8 15/16 in, Body Material Bronze, Spring Material Steel, Temp. Acting Temp.