HHAC Hesheng Metal Stainless Steel Galvanized Steel Alumnium Alloy Height Adjust Coupler is a superior quality product that is manufactured in our factory. As a leading manufacturer, we ensure that each coupler is made with highest standards of precision and accuracy using advanced technology and machineries. This height adjust coupler is designed with stainless steel, galvanized steel and aluminum alloy to provide maximum durability and strength. It is adjustable to different heights and is suitable for various applications such as scaffolding, construction and engineering projects. We take pride in our commitment to quality and our dedication to providing the best products to our customers.