We supply Calcium Granules and Calcium lumps, the quality is very best, and price is very low. Usually the spec, as following: 1) Calcium granules Sizing: 0-2.0mm or as your request Quantity: 14mt ( 1x20' ) Specification: Ca, 98.5% min, Mg, 0.5% max, Al, 0.5% max Packing: The poly-bags filled argon gas in, sealed in iron drum, and 175kg each drum