Printed using a plant based grey plastic filament (PLA). The shade of grey may vary due to material suppliers and availability. Due to the nature of 3D printing there may be minor imperfections, however all items are quality checked before being posted. The miniature models used for product photos are to show sizing and display purposes only. They are not included in the orders. The 3D Models you receive will be of the same or better quality than those displayed in the listing pictures. All items are cleaned from artifacts and "stringing" (the wispy lines of material from the production process).