K&H PET PRODUCTS Extreme Weather Kitty Pad Deluxe Cover Gray 12.5" x 18.5" x 0.25"

Extreme weather kitty pad deluxe cover vs. lectro-kennel deluxe covers. are they the same item?

how long is the cord as i have to have a long one to reach the kitty dome as i am plugging outside

None of the product description sizes line up ... can you just tell me which pad fits the k&h pet products mod thermo-kitty heated shelter?

Can I put the Deluxe Fleece cover OVER the simulated sheepskin cover that came with the pad? It seems it would make the bed even softer....or is there a chance of overheating by doing this. Please advise. Thanks! Val