Drafting Film Double Mat Polyester 4 ml - A very versatile product used for just about anything. It is a thin 4 ML Polyester material with a frosted coating on both sides. It looks opaque but is really translucent (like tracing paper). If you lay it on something you can easily trace right through it. It is very popular for drawing and cutting out patterns for wall stenciling. Architects and engineers have always used it for technical drawing. The surface offers the most precise pen and ink work. We even have customers use it for lampshades and room dividers.