Polymer Concrete Manhole Covers and frames. SABS Approved. These polymer covers have no scrap or resale value. Covers are available in light, medium and heavy duty. Sizes available: 150x150mm, 230x230, 265x265, 300x300, 450x450x450x600, 660x660x670x525, 930x630, 930x930 and 1mx1m. 705, 605 and 545 mm in diameter (Round) . Manhole covers are available in Lockable options. Storm water grate and frames: 230x230mm, 300x300, 450x450, 400x570mm Inlet Kurb: 1000x250 or 300mm. Precast optic chamber: 600x600mm, 800x800x800mm, 1000x1000x1000mm medium Duty and heavy duty. Complete Manhole: 1 meter coping for 2A / B 600mm cylinder cover lock MD 800mm Cylinder cover lock MD 800mm Cylinder cover lock HD 1000mm Cylinder cover lock HD Valve and Hydrant Boxes are also available. These polymer covers will never get stolen for scrap metal. Covers are available in light, medium and heavy duty. Light duty for pedestrians not exceeding 700kg point load. Medium duty for light vehicles not exceeding 4