Compact and Durable Black Plastic Pot for Versatile Planting Viagrow 1/2-gallon black nursery pots are measured in trade gallons, a standard term used in horticulture to denote container sizes. One trade gallon is approximately equal to 0.71 U.S. liquid gallons. These black pots are BPA-free, food safe, and designed to be affordable and durable. They are ideal for various types of soil or hydroponic growing media. The round plastic nursery pots feature a raised rim design for easy handling and stacking when not in use and can be reused indefinitely. Specifications: Specification Details Top Diameter 6.5 inches Bottom Diameter 5.25 inches Height 6.