[Packing List] You will receive 1 soilless culture medium with 50 plugs in total, which is enough to support planting a large number of plants, and you will experience the pleasure of planting. [High-quality material] Our rock wool plug is a very effective hydroponic product. It is made of high-quality basalt. After melting at high temperature, it forms fibers at high speed, and it is compressed into blocks by a proprietary process. It has soft and uniform texture, good water absorption and strong air permeability, which is conducive to root growth. [Usage] The pH value of the new stone wool Square is relatively high, generally 7-8, so please dilute it with water until it reaches 5.5-6, or add appropriate acid, squeeze some lemon juice to reduce the pH value of the juice, and then use it. Please wear gloves when using. [Easy to transplant] Growing cubes make seeds long enough to establish root system. Because they have high water absorption and retain a lot of oxygen, you can cut them into different sizes. The cubes 't corrode after immersion, so they are easy to transplant to net pots, soil. Material: rock wool colour: as shown Package Contents: 50 x Seedling block Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.