Mr Stacky Large 64 qt. Vertical Garden Planter - Set of 5 Maximize Any Space - Garden Effieciently Black Color Prevents Algae Growth Near Root Zone Ideal Tool For Indoor Hydroponic Gardeners - Center Hole Used For Water Line Flow Through Design - Protects From Over Watering, Root Rot, and Disease Plant, Stack, & Enjoy - 20 Plant Site - Heavy Duty Durable Product - Indoor / Outdoor