Ours hydroponic baskets are made of high quality PP plastic material, good tenacity and durable,not easy to be deformed and corrosion resistant,and it is safe and non-toxic. Size: the upper diameter is 3.27 inches, and the bottom diameter is 2.16 inches, with the height 2.56 inches. Net pot with holes in the bottom of these cups produce healthy roots with even drainage, which let the roots grow their own way, right down through the pot and out of the sides, allow for bigger, healthier roots. Slotted Mesh Design: Net pots are designed with slotted mesh, which can promote a more efficient plant growth through aeration, with the holes in the bottom you can produce more healthy roots and better drainage, allow the roots grow with their own way. The hydroponic basket is suitable for garden, balcony, and flower nursery.It is not easy to deform and rust, convenient to use. Perfect for aquaponic and hydroponic garden of orchids, tomatos, peppers and herbs, etc.