Our plastic pipe sleeves are about an eighth of the weight of steel sleeves. Talk about an easy install! This is a 25 inch HDPE wall sleeve made from super strong polyethylene plastic material that resists corrosion and has excellent impact strength. Made by Century-Line, these sleeves are designed to work in tandem with Link-Seal modular seals to create the ideal watertight pipe penetration. Model: CS-25, Material: HDPE, ID (in.): 24.81, ID (mm.): 630.2, lbs: 23, Kg: 10.34