S137 Upright Extrusion Connector is used to connect S100 and S108, It is made of steel and aluminum, and weighs 0.052 kilograms. It is made up of two parts, steel bolt is inserted into the S100 and aluminum connecting block is inserted into the S108. The holes of S100 and S108 are in different sizes, the diameter of S100 is 8.7mm while the S108 is 20.8mm, with this product, they can be connected together.  Thanks to full ranges of accessories, Standard System is able to realize various functional and advanced designs and is easy to install, dismantle, transport and store. The most classic solution, yet still universal in countless scenarios, for standard booth\ shell scheme\display booth \exhibition booth\pavilion group booth\trade show\back to back booth\fascia board\expo and liner booth, widely used in exhibition industry.