Description: Material: Rock wool Size: 2.5*2.5*2.5CM Color: Light yellow Feature: 1. Highly efficient water retention and aeration, providing an ideal growing environment for plant roots and significantly increasing hydroponic crop yields. 2. Made with high-quality rock wool, ensuring healthy crop growth. 3. Stable structure, maintaining root support for a long time, suitable for various agricultural planting systems. 4. Specifically designed for hydroponics, promoting rapid seed germination and root development, shortening the growth cycle. 5. Compatible with mainstream automated agricultural equipment, improving planting efficiency. Note: 1. Manual measurement may have an error of 1-2cm. Please understand, thank you. 2. Due to the difference between different monitors, the image may not reflect the actual color of the item. Package includes: 50*agricultural rock wool hydroponic planting blocks / 100*agricultural rock wool hydroponic planting blocks