Grodan A Ok Stonewool Cubes 1.5L x 1.5W x 1.5H Inches - 30 Sheets of 98

This growing medium is an excellent choice for absorbing nutrients and supporting growth in all of a plant's stages. The Grodan A Ok Stonewool Cubes is a multi-fiber rockwool that is compressed into cubes, blocks and slabs. This rockwool comes in sheets designed to fit a standard 10 x 20 inch flat. About Hydrofarm, Inc. Celebrated as the nation's oldest and largest manufacturer of hydroponic equipment and grow lights, Hydrofarm has made professional-grade equipment available to all since 1977. All grow lights and electric components are UL listed, unlike many competitors' products, meaning you get years of reliable and safe use out your high-intensity lights. All products are covered by a one year warranty, at the least. In some cases Hydrofarm ensures the performance of their products for five years. Rockwool made from many fibers. Supports plants through all growth stages. Absorbs nutrients and retains oxygen. Easily transplant from cubes to traditional planters. Manufacturer's warranty included.