QUALITY MATERIAL: The 9907120011 heating element replacement for Masterbuilt 30" smokers is made of quality stainless steel, featuring in good thermal conductivity, oxidation resistance, and well-tested by the manufacturer to meet the OEM standard. COMPATIBILITY: The electric smoker heating element can replace Masterbuilt part number: 9907120011, Master Forge: 20071214, Masterbuilt: 21071218, and compatible with Masterbuilt "2007" series & "MB" series: 20070213, 20070312, 20070816, 20071117, 20071217, 20071218, 20071314, 20071317, 20071414, 20071514, MB20070619, MB20071117, MB21073219, MB21074519, MB25073519, MB26072415, etc. .