20-4mm Graded Aggregate
Also known as 20mm Clean, Pea Gravel, Drainage Stone, Clean stone, Pipe Bedding, Concrete Stone, Concreting Stone
Size: 20mm to 4mm
Stone: Hard Stone Quarry: Limestone, Granite or Gravel.
Application: This is used for standard drainage purposes and driveway stone. This sizing is also mainly used in concrete.