Engel Transit Bag Suits MT17F-G4 & MD17F Fridge/Freezer. The Genuine Engel Transit Bag is a heavy duty insulated cover that protects your investment from bumps and scratches maintaining its resale value. It increases the ‘cold hold down’ time overnight. Also incorporates a storage pocket for your cords. Beware of imitations. Suit MT17F and MD17F. Features: Heavy duty insualtion. Protects against bumps and scratches. Increases ‘cold hold down’. Storage pockets. MT17F & MD17F.