1177 Hi Limit Switch Thermostat is a safety device that shuts the unit off and prevents the oil from overheating, The Thermostat Fits Bulbs Up To 3/8" Diameter, works on millivolt systems. Made of quality metal that are guaranteed to exceed OEM specifications. Suitable for professional part, Protects your fryer while allowing better control of oil temperature. Direct installation, effortless, Continuous running time is longer. 1.Which models are compatible with the Gas Hi-Limit Switch ? compatible with Imperial Fryer 1177 series: IF, IF-BL, IRFS IFS, IFS-40, IFS-50 IHR, IR. compatible with Anets fryer: 42564 P8905-02, 14UF(S) compatible with American Range fryer: 11112 A10007 AF35/40, AF35/50, AF45. AF 2545, compatible with Tri-Star Fryer: LCCM080360000 2.What's the Features for the Replacement Parts 1177 Gas Fryer High Limit Safety Cut Out Thermostat ? 3.The high limit switch safety thermostat for Fryer Replacement part number / Replaces OE#: 1177 3/8" Mpt Stuff Box,Gas only