These universal stainless steel clamps are great for motorcycle exhaust mounts. Minimum size of 1.44" to max size of 1.58". These are ideally sized for 1-1/2" exhaust pipes. Welding a simple tab or utilizing a stock location (such as the bottom holes on unit Triumph motor mount plates, see pic below!) makes for a very stable and simple mount. Sold per pair. Made in the USA.