The Brass Wall Flange from our Origin Shelf collection is part of our family of machined fittings for custom shelving units & is used for securing the shelving unit to the floor or wall & allows for a tube intersection. You can order as many as you need for your project. We will help you with planning & calculating fittings & tube needed. These shelves will make a beautiful addition to your home, or business. 3 7/8 long x 1 diameter with a 2 1/2 diameter flange, to be used with 5/8 tube. This listing is for a single brass flange fitting, & does NOT include other fittings or tube. Please message for inquires on building a shelving unit for your needs! Unit does not come with shelving unless specified. We cannot provide glass. California Prop 65 warning - Some brass products may contain chemicals, including lead, known to the state of California to cause cancer & reproductive harm. For more information, go to www.P65warnings.ca.gov. Brass Wall Flange For Classic Bistro Shelf - The Origin Shelving Unit Custom Design Made To Order