Z189 internal corner connection is used in corner, exclude four pieces setscrews M4x10. It is made of steel and weights 0.016 kilograms. All of our accessories are easy to install.  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.