Engineering Circle Screws Nuts Bolts Screws Symbols Drawing Template Mechanical Circle Screw Nuts Symbols Drawing Template Stencil Dimensions: 200 mm x 95 mm (7.8"x 3.7" ), Thickness: 1.9mm. Made from transparent, green plastic. The rate of transparency allows to see the drawing medium below template for easy positioning. This engineering stencil contains symbols of isometric ellipses, metal nuts, screw bolts High quality, brand new item supplied in original packaging.