Bosmere F476 Compressed Coco Chips Brick (Pack of 4) Each compressed brick will expand to up to 6 quarts when re-hydrated with water The 4 bricks in each order will make up 2 gallons worth of material Ideal for orchid growing, hydroponics, terrariums and more Made from a renewable resource Made in Sri Lanka under strict quality standards that are ISO 9001 systems certified