[Packing List] You will receive 1 soilless medium with 50 plugs in , which is enough to support planting a number of plants, and you will experience the pleasure of planting.[High- material] rock plug is a very effective hydroponic product. It is made of high- 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 growth.[Usage] The pH value of the new stone Square is relatively high, generally 7-8, so please dilute it with water until it reaches 5.5-6, or appropriate acid, squeeze some lemon to reduce the pH value of the , and then use it. Please wear gloves when using.[Easy to transplant] Growing cubes make seeds long enough to establish system. Because they have high water absorption and retain a lot of oxygen, you can cut into different sizes. The cubes 't corrode after , so they are easy to transplant to net pots, soil.Material: rock colour: as shownPackage Contents:50 x Seedling blockOnly the above package content, other are not included.Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.