This knotty alder interior door pairs a two-panel design with a clean, considered profile, adding a tailored, intentional touch wherever it hangs. The door is built from knotty alder, a warm, characterful wood whose natural knots give every door a one-of-a-kind, rustic personality. Inside, an engineered laminated veneer lumber (LVL) core and engineered stiles and rails work together to deliver strength, stability, and resistance to warping over the long term. Stain or paint it to match the rest of your home. It is a versatile choice that fits a variety of design styles.