HALFGRN Sheet: Medium Density Green Features: -Works great both as a mechanical and a biological media. -Mechanical media — collects debris more efficiently and prevents clogging; solid fibers resist sludge build-up making it a snap to clean. -Biological media — provides a tremendous amount of surface area. -Easily cut with sharp knife and custom shaped to fit in almost any filter. Product Type: -Filter Accessories. Dimensions: Overall Height – Top to Bottom: -39 Inches. Overall Width – Side to Side: -24 Inches. Overall Depth – Front to Back: -1.5 Inches. Overall Product Weight: -5 Pounds.