Cultilène is one of the world's leading substrate producers. They have a great reputation in the industry as a company that puts the grower first. The Cultilène stonewool cubes are made to fit the large hole blocks and are supplied in an easy-to-use tray. The cubes have an effective air-to-water ratio and a reliable homogeneity with great strength and dimensional stability and excellent controllability. This media is inert and pathogen free. Dimensions: 35mm x 35mm x 40mm