✿ Applicable Model—Compatible with Masterbuilt Gravity Series Models: MB20040220 / MB20041020,MB20041220 / MB20041320,MB20040221 / MB20042221; ✿ Gravity series fan kit—Replacement Part Numbers: Model # 9904190040,With the push of a button, the digitally controlled fan moves air flow from the hopper to the cooking chamber and maintains desired cooking temperature; ✿ Hopper Lid/Door Sensor —Replacement Part Numbers: 9904190041- Lid/Door Switch Kit,AC 250V, 50/60Hz, CE approved, safe and reliable; ✿ Package Include —1pc * Gravity Series Digital Fan replacement+1pc *Stainless Steel Fan Guard+4pc *Wires+3pcs * Hopper Lid Switch/Door Switch; ✿ Easy to Install —The installation is very simple, plug and play. If you have any questions about the installation, you can send us an email or retrieve the installation video on YouTube; Replacement part for Masterbuilt Gravity Series Fan with Hopper Door Switch Kit,fit for Masterbuilt 560/800/1050 XL Digital Charcoal Grill+Smoker Accessories