50 pieces 25x25x25 millimeter water stone wool growing media cubes plant cubes without soil substrate seed rock wool conduction seedlings block

Features: Made of melted carved rocks in cotton fibers resembling candy, then compressed into cubes. After high-temperature processing, non-toxic and sterilized. Loose density is small, the texture is light, and porosity is large. Good air permeability, strong water absorption, and good drainage. Suitable for planting and using all kinds of plants. A great option for soilless cultivation. Specifications: Color: Green Quantity: 50/100 pieces Size: about 25x25x25 millimeters Included in the package: 50/100 pieces * wool cubes Notes: 1. Due to screen differences and lighting effects, the actual color of the product may vary slightly from the images. Thank you! 2. Please allow a measurement deviation of 1-3 cm due to manual measurement.