Material: Rockwool plugs are made of high quality molten rock, spun into marshmallow-like fibers through exquisite craftsmanship, with low bulk density, light texture and durability. /p> Easy to use: The rock wool plug has good absorption capacity, can quickly absorb the nutrient solution and promote rapid plant growth, simplify the seedling cultivation process, and is easy to use . Multiple uses: rock wool planting plugs are suitable for agricultural seedlings, hydroponic plants; Also suitable for potted plants, flowers and garden vegetables, rockwool plugs are a good choice for soilless cultivation. Features: Spun from molten rock into fibers like marshmallows, then pressed into cubes. High temperature processed, non-toxic and sterile. < p>Small weight, light texture and high porosity. Good breathability, strong water absorption and good performance drainage. Suitable for the cultivation and colonization of all kinds of plants. Ideal for cultivation without soil. Rockwool Specifications: 25*25*40mm Material: rock wool < p>The 26-piece set contains 26 cups 30 seedlings of 10 meters quick cotton rope packing size 29*23*5cm, 0274kg Note: The data are all manual measurement, please Please allow 1 - 3cm error, due to the difference in light and display, there will be some color difference, depending on the physical object received.