These 3" Flex Net Pots are just the right size for starting seedlings and propagating cuttings. They can accommodate most types of media, including Rockwool cubes, Oasis cubes, Super Starter plugs, Hydroton, peat pellets and more. These pots are a great way to start plants and bring smaller plants or herbs to maturity. Most commonly used in hydroponic systems, these net pots should be inserted into a 2 7/8" hole when building your own system.