Grodan Stonewool MacroPlugs Ventilation Includes: 2-stage 10 in filter

Includes: 2-stage 10 in filter unit

It is suitable for growing in pots and open soil and both in and outdoors

Specialized ratios of Phosphorous and Potassium collide together in a mixture that explodes blossom size and increases essential oils within the bloom

100V-120VAC voltage capacity

Grodan Stonewool MacroPlugs Ventilation Includes: 2-stage 10 in filterMacroPlugs 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.