Super-strong light-weight base made from structurally foamed polypropylene. Fabricated bicycle-proof steel grate available in two strengths for light and heavy loads (Class A 10kN, Class B 80kN). Checker plate covers available (Class A 10kN). Templates tattooed on base for connection to stormwater pipes. Colour of base - black. With proper installation, supports weight of industrial traffic. Riser available. Length: 560mm. Width: 560mm. Height: 510mm. Height of grate: 45mm. Height of riser: 150mm and 300mm. Capacity: 75 litres.