Grow Efficiently with Cultiwool 1.5" Cubes W/ Shrinkwrap (Case of 2,250 Pieces) by Cultilene. Ideal for Hydroponic Setups, Ensuring Optimal Plant Growth. https://www.hydroponicstown.com/cul119-cultiwool-1-5-x-1-5-x-1-5-cubes-w-shrinkwrap-case-of-2-250-pieces-cultilene