Features: Hydroponic Rock wool Slabs provide efficient soilless cultivation, promoting healthy root development and better growth for a wide variety of plant. Crafted from premium rock wool, these growing cubes offer excellent water retention and superior aeration, ensuring consistent moisture and oxygen supply to plant root. Ideal for gardening enthusiasts, home growers, professional farmers, and educational institutions seeking reliable plant cultivation solution. Versatile for use in balcony gardens, greenhouse setups, or classroom hydroponic projects, adapting effortlessly to modern and agricultural environment. This rock wool slabs system reduces soil waste while supporting sustainable gardening practices, making it a future forward choice for plant propagation and seedling development. Specifications: Component: Rock wool Size 1: approx.29x14cm/11.42x5.51inch (single:2.5x2.5x4cm/0.98x0.98x1.57inch) Size 2: approx.29.5x13cm/11.61x5.12inch(single:3x3x5cm/1.18x1.18x1.57inch) Size 3: approx.29.5x15cm/11.61x5.91inch(single:4x4x5cm/1.57x1.57inch) Quantity: 50pcs/ 36pcs / 21pcs Package Includes: 1 Set Rock wool Slabs note: Please allow 1-2cm error due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color of the item.