Grodan Stonewool MacroPlugs (Case of 35 Bags) Environment DO NOT connect the 12

DO NOT connect the 12 volt dc power supply to the SPH-1

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Grodan Stonewool MacroPlugs (Case of 35 Bags) Environment DO NOT connect the 12MacroPlugs are 1. 5 in round with a slit that allows easy insertion of a cutting. These loose round plugs fit perfectly into the Gro Block hole. For best results, always insert MacroPlugs in a tray with individual cells. The individual cell will make sure the plug stays closed around the stem of your cutting.