Material: cotton, product size: 27 * 20mm [Super Absorbance]:Growing rockwool has an enormous ability to absorb nutrients while retaining enough oxygen for fast-growing plants. [High quality material]: The rockwool cube is made of melted stone, spun into sugar-floss like fibres, treated with high temperature during the process and finally brought into a cylindrical shape. Practical and practical: the cylindrical rock wool cultivation can adapt to different sizes of culture pots and only needs to be filled according to the gap without cutting. [Easy to use]: Rockwool propagation mat can be sown directly, which simplifies the cultivation of seedlings and saves time and effort. Also suitable for cuttings, cloned plants, germinated seeds, etc.Easy to carry and portable. Wide application: 100 pieces of rock wool plugs suitable for planting, transplanting, rooting, cloning plants, germs etc., it is an excellent choice for hydroponics and earthless plants.