1. Strong Compability: The control board is compatible with Atwood 91504, 91420, 91606 2. Upgraded Design: The control circuit board adopts advanced design and intelligent management to improve the use experience. 3. Strong Stability: Ignition control board adopts excellent electronic components, , PCB files to the stability of product performance. 4. High Standard: Which can be perfectly adapted to RV water heater circuit board replacement. Item Type: RV Water Heater Control Board Manufacturer Number: 91504 Compability: Compatible with Atwood 91504, 91420, 91606 Replaces for MPD 93307, 91420 Colour:black Material:plastic Package Contents: 1 x Circuit board Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.