NEW Grodan Stonewool 2"x2" 50 Sheets Cube A-OK Started Plugs Seed Propagation Grodan A'OK plugs are designed for seed and cutting propagation prior to "blocking on" into larger growing blocks. The V-shape design of the plug discourages tangling of roots between the plugs in the A'OK plug sheet. A'OK plugs come in a sheet that fits a standard 10x20 flat. 1 Sheet of 50 2x2 Cubes