Replacement AGA dome insulating seal Marseal 800s which can be fitted on the inside domes of the lids on post 1974, pre 1979 models of AGA electric, AGA60, Total Control, Dual Control & gas appliances. AGA 13amp electric appliances from between 1974 & 1979 AGA 30amp electric appliances from between 1974 & 1979 AGA Oil appliances from between 1974 & 1979 AGA60 appliances AGA Total Control appliances AGA Dual Control appliances AGA gas models PLEASE NOTE: Any part purchased MUST be installed by a trained, qualified, competent person who has the necessary skills to undertake the work on the appliance.