Manthorpe GW531 2.44m x 146mm Plywood Cover Board - Pack of 10 Please note this is the GW531 plywood cover board only. Properties Length: 2.44m. Width: 146mm. Depth: 12mm. Material: weather/boil proof plywood. Description In the past builders would set their pipes into concrete floors “ and a burst pipe could lead to hours of laborious work. Nowadays, Manthorpes underfloor ducting system means that for routine repair and maintenance you need little more than a screwdriver and a spare half hour. The pipe and cable duct comes in a variety of sizes to accommodate varying amounts of cables and pipes. Made from hard wearing plastic, it can be set directly into a concrete screed, and covered with a solid plywood board. Features Manthorpes ducting provides easy access for service pipes and cables. The components are easy to handle, cut and fix. Joints and corners formed by simple mitring. The ducting is available in various sizes to accommodate two, three and four pipe runs.