The Strend Pro 40Q attachment is intended for a plastic pipe welder. For each welding machine, it is necessary to have a set of attachments with different diameters so that you are prepared for any situation. The Strend Pro 40Q extension is made of high-quality material, is easy to assemble and is affordable. If you are missing a 20 mm extension, then the Strend Pro 40Q is here for you.