Grodan A-OK 50/40 2 in x 2 in Plugs (50/Sheet) (30 Sheets/Cs)In Store Location: M4 Grodan Stonewool A OK Starter Plugs A OK Starter Plugs for starting seeds and rooting of cuttings prior to plugging into the larger Gro Blocks. A OK Starter Plugs come labeled with instructions in a shrink wrapped sheet that fits a standard 10 x 20 tray (flat). Note: Item #713020 is supplied without shrink wrap.