Grodan Gro Block Improved GR10 Large 4" w/Hole 4" x 4" x 4" Strip, (case of 144 blocks) Master Controller Tumbler Diameter: 2 x 6

Tumbler Diameter: 2 x 6

Case quantity is 16

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The Raptor 1000W Double-Ended Reflector combines the proven performance and design quality of our Raptor with the amazing intensity of DE lighting

Grodan Gro Block Improved GR10 Large 4" w/Hole 4" x 4" x 4" Strip, (case of 144 blocks) Master Controller Tumbler Diameter: 2 x 6Grodan Improved Gro Block Improved GR10 Large 4" w Hole 4" x 4" x 4" Strip Grodan partnered with the Wageningen University and Research facility in The Netherlands and top growers throughout North America to identify the optimal stone wool substrate and irrigation strategies for specialty crops. The result of months of scientific research and trials is Grodan Gro Blocks Improved with Grodans Advanced Wetting Agent. These leading edge blocks have the