Scraper rings with asphalt stop

The scraper ring is laid directly under the surface box to bring it level with the surrounding ground. Several rings can be stacked. The fixed gasket on the inside guides the ring into place and seals against sand and asphalt. During construction, the ring also prevents objects from falling into the manhole. The ring is made from recycled plastic and is lightweight, strong and does not crack. It reduces friction between the surface box and the manhole, resulting in less damage from traffic vibrations. With load class D 400, it suits most surfaces.