Auer-Jordan says its full-round wall rail fittings join easily to standard full round rails in 1-1/2-in., 1-3/4-in. and 2-in. diameters. The company says it is possible to create a complete service rail system by combining its extensive line of fittings with standard straight round rails. The company’s products are made in the USA. (707) 838-1918, AuerJordan.com