Grodan MM 40/40 6/15 Plugs, 1.5" x 1.5" x 1.5", 15 per strip, 3 strips per pack RWMM4040 | 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