Heavy Duty Two Legged Middle Frame Fitting 2 3/8" legs and top-rail. These are for schedule forty 2" pipe, 2" ID and 2 3/8" OD. The top rail pipe will slide all the way through the frame fitting that is 6 3/4". The set screws at 12 millimeter and use a 6 millimeter Allen wrench. This product should last 2 years in harsh conditions and up to 5 years in optimal conditions. Some conditions may require replacement sooner. These are sold individually.