Features: Suitable for ADS81155CNA and GDS81155CX. Very suitable for users who need to replace or upgrade their home heating systems. Make of metal, it is heat-resistant and enduring, and can be used for a long time. The L250-30F limit switches can effectively prevent overheating and protect your heating systems from damage. The design is simple, easy to install, and can be replaced within a few minutes. Automatic reset: Keep closed (continuous) during normal operate. Disconnect at 250℉ to cut off power and prevent overheating, and automatically reset and close after cooling to 220℉ without the need for manual reset. Specifications: Component: Metal Size: about 5x3.8cm/2x1.5inch Applicable models: Suitable for ADS81155CNA ADS81155CNA ADS81155CXA ADS81155CXA DDS81155CXA DDS81155CXA GDH80453AX GDH80453AXAA GDH80453AXAB GDH80453AXAC GDH80703AX GDH80703AXAA GDH80703AXAB GDH80703AXAC GDH81155CX GDH81155CXAA GDH81155CXAB GDH81155CXAC GDS81155CN. Package Includes: 1pc Limit switches note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.