Two Hung: Sheanimale

: This implies a Solid Core construction. Unlike hollow pieces, these are made of a dense material that provides: Better sound reduction. Increased durability and weight. Resistance to warping or shrinking. Common Variations

: This usually refers to a "Double Hung" configuration. In windows or doors, it means both sashes or panels are operable (can move up or down). sheanimale two hung

If you are looking for specific home hardware, retailers like Home Depot carry many units. : This implies a Solid Core construction