Product Name: Variegated Pebble for Water Treatment with Awwa, F08 Series Model NO.: F08 series, AWWA standard, Mottle Sand Particle Size: 4-32 mm Sandstone Type: Cobble Stone Form: Sieve Type: Pebble Usage: Paving, Decoration, Landscape, Water Treatment Color: Variegated Surface Finishing: Sieve Choose Material: Natural Stone Natural Stone: River Stone Trademark: Lerona Transport Package: 25, 50, 500, 1000 Kgs Woven Bag Origin: China Product Description Variegated pebble for water treatment with AWWA standard, F08 seriesVariegated pebble for support gravel in water treatment(F08 series), CobbleVariegated pebble other name: Cobble support gravel, Support gravel etc. Variegated pebble (F08 series), the low strata of a filter bed, acts to support the filter media. The max efficiency, the support gravel must possess the necessary attributes of hardness and be rounded or non-angular. Correct gradation and sizing must be calculated to properly support the filter media. Variegated pebble , Support gravel(F08) spec: AWWA standard:Variegated pebble , Support gravel(F08) package:25, 50, 500, or 1000 kgs woven bagTypeSiO2ContentminDensityg/cm3Insoluble inHCl, maxBulk densityg/cm3HardnessMoh, minAttritionmaxVariegated Pebble, SupportGravel(F08)60%-90%2.6-2.90.2%1.7-1.95.0-7.01%Particle size,mm2.0 -4.0mm , 3.0 -5.0mm , 4.0 -6.0mm , 6.0 -8.0mm , 8.0 -12.0mm , 8.0 -16.0mm , 12 -20mm , 16 -25mm , 16 -32mm , 30 -40mm (Other specs. are available)