The mesh screen is used to cover the drainage hole of the bottom container before planting, allowing water to drain freely while holding the potting soil in. Prevent potted soil and roots from going bad, provide good support.SpecificationColor: BlackShape: RoundMaterial: PlasticThickness: 0.3mm / 0.01 inchDiameter: 5cm/ 2 inchPackage Contents: 50 x Flower Pot Hole Mesh PadAdvantageReusable plastic material is resistant to corrosion and aging, toughness, and can be cut at will.InstructionSimply place the flowerpot mats over the empty pots' holes and fill them with soil.Note:The grid pads can be combined with a lined saucer to keep dirt from washing out of planters.