Is the Cynex 6777 energy efficient?

Its expanded polystyrene core is a basic insulator, well below polyurethane foam or solid-core doors. Expect it to be fine in mild climates but weaker in cold or windy exposures.

What is included in the box?

The prehung door comes with its steel frame, lock, stainless steel handle and Combi Arialdo hinges. A canopy over the door is required but sold separately.

What size opening does it need?

The door is 60 inches wide and 96 inches tall with a 3.25-inch thickness, so the rough opening must be framed slightly larger to fit the prehung frame. It cannot be customized.

Can I get it with the hinges on the other side?

Yes. It is offered as right-hand inswing, left-hand inswing and right-hand outswing. Pick the handing that matches your opening before ordering.

How does the Cynex 6777 compare with a fiberglass entry door?

Fiberglass doors resist dents and rust better and usually carry a foam core, so they insulate more. Steel is stiffer and cheaper to build at this width, but it can dent and needs repainting if the finish chips.

Does the door come with a threshold and weatherstripping?

The listing covers the prehung frame, lock, handle and hinges. Ask the seller about the threshold and weather seal, since a canopy is required over the door and those parts matter for a weathertight fit.