100% Virgin Quality Plastic and Lead-Free Netpots for Hydroponics, Aquaponics or Aeroponics. These netcups are highly durable and can be reused multiple times over. They are 2 mm thick and come with a 4 mm rim support at the top. The 3 inch net pots are meant to be used in hydroponic DWC and NFT channels for leafy greens like lettuce, spinach,and tomato,capsicum etc. The wide spaces allow for the excellent drainage of water and offer very less resistance to root growth. This allows the roots of plants to grow naturally in all directions. This makes the root mass bigger and healthier which helps in optimal growth of the plants.