Dinosaur Electronics SERVEL SR1 Aftermarket Dometic / Servel Refrigerator Main Power Control BoardDinosaur Electronics SERVEL SR1 Aftermarket Dometic Servel Refrigerator Main Power Control Board Use in Dometic Servel Models: S520, S530, S619, S620, S630, S819, S820 & S830 2 or 3 way operation AC DC Gas SIZE: 3. 35" x 4. 50" *CLICK HERE TO SEE REFERANCE CHART* Note! You must keep your old cover and may have to modify it slightly for those models that do not have a storage switch. Detailed in the instructions.