Feature 1Compability: The control board is compatible with Atwood Dometic 91504, 91420, 91606, please confirm whether your model is applicable before buying. 2Replace Number: The manufacturer number for reference is 91504, please confirm whether it is consistent with the number you need. 3Function: The RV circuit board fuse combo replacement kit is used on gas only direct spark ignition water heaters, easy to use and has high efficency. 4High Standard: RV water heater circuit board replacement adopts OEM production standard, which can be perfectly adapted to RV water heater circuit board replacement. 5Easy to Install: The RV water heater control board has simple installation, all needed installation hardware is included in the package, no need too much time to install.Item Type:WaterHeaterControlBoardManufacturer Number: 91504Compability:Compatible with Atwood Dometic 91504, 91420, 91606 .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 x ControlBoard Kits(total 3pcs)2 x ScrewNote1. Please double check the part number of your item, matching information is for reference only.2. If you are unsure of the item, please contact us before buying to avoid unnecessary return, thanks!