Growing medium is specially engineered for the hydroponic seeding production of vagetables andherbs as it is having lower destiny and higher drainage foam. Ther higher drainage design helps to maintain an idial air to water balance,even under heavy watering condition. size small grow cubes- 2.2*2*3.8cm-276 cubes*20sheet box size og big grow cubes- 3.5*3.5*5- 192cubes*10sheets box grow cubes standared-2.5*2.5*3.7-156 cubes*20sheet box