MORE FLEXIBLE DRAINAGE FEATURE Drainage: Excessive water retention can be unhygienic and hinder plant growth when plants are immersed in water for prolonged periods. In such cases, you can choose to enable the drainage option, providing a better growing environment for your plants.Water retention: Conversely, when your plants require more water, you can choose to block the drainage holes for easy water retention. PRODUCTS INCLUDE 20 IN Plant Caddy 3 trays, 24 wheels (a tray with 4 brake wheels), 3 sets of drainage, 1 small wrench Dimensions: Outer Diameter: 20", Inner: 19.3", Height: 4.33", Tray Depth: 1.57"Load: The plant stand is sturdy enough to support 300LB plants You don't have to worry about overwatering or under watering. The detachable water tray can be used flexibly, allowing you to pour any excess water back into the plants, utilizing the nutrients present in the soil. DURABLE The tray of this plant stand outdoor is made of iron, which is more wear-resistant than ordinary plastic bases. The surface of the tray is coated with a layer of protective paint, making it waterproof, resistant to wear, and less prone to rust. LOAD-BEARING & SILENT The solid rubber wheels of the rolling plant stand with casters heavy duty are made of rubber, not plastic. Different sizes of flower pots are equipped with corresponding numbers of swivel wheels, ensuring silent operation, protecting the floor, and providing stronger load-bearing capacity. EASY CONTROL Each product includes two brake wheels, allowing you to easily secure the plant caddy in place, ensuring the safety of large potted plants. Avoid applying excessive force when tightening the drip tray tube, as it may deform the gasket and render it ineffective in preventing water leaks. We strongly recommend testing it after initial installation instead of removing the water tray to prevent any potential floor wetting during subsequent use. Rest assured, we have thoroughly tested the water leak prevention feature over an extended period of time and can ensure its effectiveness. Please note: The gasket must be installed on the back of the tray, not inside the tray.