Perlite #3, 4 cu.ft. bag
Grodan Pro Delta4 Block, 3"x3"x2.5" w/hole, case of 384,comm
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...