Hugo Gro-Block, 6" x 6" x 5.8", with hole 40/40, case of 64 RW241001 | Grodan

Grodan Stonewool (rockwool) is made from molten rock spun into cotton candy-like fibers and then compressed into cubes, blocks, or slabs. Where other rockwool brand manufacturers cut all sizes from one batch of wool, Grodan is unique by making differen