Our professional Humidi-Grow Black Humidity Trays are heavy duty high quality essential items for healthy and happy orchids and all prized plants. We have assembled several handsome pure black humidity trays with an eye on basic utility and economy. Our logic is that these fit together so nicely, you can get one, or any combination to cover your growing area requirements. They are all the same color, the same depth and have the same design. Old fashioned quality and utility but with modern style in a refreshing black.