Planter Feet Outdoor Pots Round Flower Pot Tray Pot Feet Planters Flowerpot Tray. 12 Pcs Chalk Small Blackboard Hanging Signs Erasable Chalkboard. The A3 light box is eyesight-protected, portable, stencil board with 3 brightness adjustable, you can adjust the brightness by simply pressing to the button till you get the brightness, increases the accuracy of your drawing.