This hydroponic net cup set is made of BPA-free, non-toxic safe plastic, durable enough for years of frequent outdoor use and reusable for environmental protection. The slits are optimally spaced to let roots naturally poke out and stretch through, while the depth easily holds planting media like clay pebbles and rockwool cubes. The 0.8-inch wide rim design allows easy lifting to inspect root growth and plant health, fitting perfectly with wide-mouth glass jars and hydroponic buckets—highly recognized by large-scale hydroponics professionals. Compatible with both soil-based and hydroponic systems, it works with various media including clay pebbles, lava rocks, pumice, vermiculite, and rockwool, providing a healthy environment for plants through diverse planting methods. The package includes 12 net cups, ideal for bulk planting needs and a practical choice for both home gardening and professional hydroponics. Color: Black.