MaterialPaint palette tray is made of PVC which is eco-friendly and durable,can use for long timeLarge Capacity24 grids compartment,3.2cm x 2cm x 1.8cm per each grids,21.5cm x 10.3cm x 2cm for full box,enough grids can storage different WatercolourPrevent Color Mix Each grid has raised and depressed line marks of the wells. so that the paints do not mix with each other.Wide UsageOil color box is not only perfect for watercolors, gouache, acrylic and oil Paint ect. Perfect for student or professionals,but also can use as a storage box,like beading,bobbins,jewellery etc.Keep Paint MoistThe palette tray comes with 24 deep wells, It is also equipped with a soft airtight lid that can efficiently prevent your paint from drying,can keeps the paint moist for few days