The Adjustable Wet Painting Carrier can hold 12 wet panels (1/8" or 1/4")or up to 4 stretched canvases, or you can carry a mixture of both. the removable dividers allow you to change from panels to stretched canvases. The adapters allow you to carry smaller panels in your Adjustable Wet Painting Carrier. The Adapters are available in many sizes and with the use of the adapters you can carry multiple sizes of panels at the same time. The Adapters are also designed to work in the lid of your Guerrilla Box™.