Made of material, the modelling clay tools are durable and long lasting use. With protective coverings on the surface, the shape acrylic sheet board is used to prevent scratch and dust. The acrylic roller can adjust clay& 39;s shape or thickness. It can also be used for backing board or pressing clay into other shapes. Great for changing the shape of clay. Feature - Color: As shown. - Material: Acrylic. - Size: About 20 x 2 x 2cm/7.9 x 0.8 x 0.8inch(LxWxH). - shape acrylic sheet board: with protective coverings on the surface, against scratch and dust. - Great for changing the shape of clay. - Essential moulding clay tools: acrylic roller can adjust clay& 39;s shape or thickness, acrylic sheet can be used for backing board or pressing clay into other shapes. - Made of acrylic, it is durable and long lasting use. Four corners of the shape board are specially polished, safe to use.