Made of durable HDPE plastic, this 2" wall sleeve is designed to house pipe going through a concrete wall or barrier. The concrete is poured around the sleeve for a perfect water-tight fit. Pair with Link-Seal for the total system. Model: CS-2, Material: HDPE, ID (in.): 1.98, ID (mm.): 50.3, lbs: .7, Kg: .32,