Surface Plates Granite surface plates comes with size of 250 x 250 upto 2000 x 1000 . And flatness tolerance for accuracy grades 00 is 2 - 6?m, for grade 0 is 5-12?m, for grade 1 is 12-30?m and for grade 2 is 25-60?m. Weights ranges from 10kg -1650kg. Cast iron surface plates also available in sizes 300mm x 300mm, 450mm x 450mm and 600mm x 600mm. Qty :