HIGH QUALITY: Our smoker digital thermostat replacement for Masterbuilt is made of heat-resistant material and well-tested by the manufacturer to meet the OEM standards and ensure to support a longer service life. HIGH COMPATIBILITY: This digital thermostat controller board can replace part number: 9907160014, and compatible with Masterbuilt 30"/40" electric smokers: 20071117, 20071217, 21071218, 20071317, 20071417, 20071517, 20071819, 20072318, 20074517, MB20070421, MB20071117, MB20071619, MB20071819, MB20072918, MB20073018, MB20077018, MB20077818, MB21072918, MB25071217 MB26071317, MB28071517, etc. .