1.5 inch Rockwool/Stonewool
Made from molten rock spun into cotton candy-like fibers and then compressed into cubes, blocks, or slabs, great for Rooting Cuttings clone plants, germination start seeds and more. Encourages Faster Initial Rooting & Its Firmness Is GuaranteedProvides 20% Air Space When Saturated - Absorbs nutrient solution while retaining plenty of oxygen for rapid root growth!EASY TO TRANSPLANT - Much easier than starting in soil! Predrilled planting holes make seeding and plant propagation a breeze. Great for hobby and commecial growers1.5x1.5x1.5 Inches - great-sized to fit a standard flat growing tray.WIDE APPLICATION -These rockwool starter plugs are widely used in hydroponic, seed starting, cuttings, plant propagation and so on. Much easier than starting in soil! They are great for gardening hobby and commercial growers.