Bricks are 20 x 10 x 5(cm) in size and will expand 8 to 9 liters per brick. Bricks are used for horticultural projects such as a growing media for seedlings where limited volume is required for each project; i.e. filling seedling trays.Sieving are ¼, ½ and ¾. The ½ and ¾ sieving is Double Sieved. Bricks of the Mr. Coco Line can be offered with the option of having a slow release fertilizer added.