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.