The Isomars Professional 105cm Technical Drawing Tee is an essential tool for any architect, engineer or technical drawing enthusiast. It is made of high-quality transparent plastic, which provides maximum clarity when marking large or small parts. With a length of 105 cm (1m and 5cm), this tee is perfect for medium to large projects. It is marked on the side in millimeters, making it extremely precise and easy to use in the measuring and drawing process.