https://www.hongshengrubber.com/product/rubber-fender/super-arch-rubber-fender/ Super arch (SA type) rubber fenders are better able to support vessels and are designed to handle a wide range of conditions. They are more durable and are designed for all types of applications including shipyards, quays, docks, and marinas. They can also be installed vertically or horizontally. Their design makes them easy to install, which makes them ideal for locations with limited mounting space. Can be bolted with elastic low friction features, such as SANP. They also disperse stress and can absorb impact energy effectively. Super Arch Rubber Fenders are simple marine fender systems that can be transported easily from customer to customer. They are easy to maintain and require very little maintenance. They are IACS approved.