Drain fittings maintain required level of water / nutrients in base of bucket. Dutch buckets can be used to grow virtually any plant type indoors/outdoors hydroponically and are especially useful for vining crops like tomatoes, cucumbers, and larger plants. They are typically arranged in rows on the floor or on benches, with one irrigation supply pipe feeding drippers from above and one drainage line circulating back to the reservoir from below. Easily joined together, these systems can be scaled to any size imaginable, and are one of the most reliable and easily controlled growing methods. Dimensions: 12" x 10" x 9; capacity: 11l; color: black; material: food grade pp&uv; weight: 13 oz.