2-Pack Outdoor Planter Set, MgO Flower Pots with Drainage Holes, Durable & Stackable, for Entryway, Patio, Yard, Garden, BlackSet of 2: These two different sizes of stackable patio planters come in a square shape with a matte surface, making them an excellent accent for any deco. MgO Material: The material of our outdoor flower pot is MgO. MgO is short for magnesium oxide. Durable and lightweight, it doesn't mind UV light beaming down or rain. Water Draining: Stop worrying about waterlogging; the bottom drainage holes drain away excess rain, managing moisture levels and