Flanges: Create a stylish railing system with our wide selection of brackets & flanges. Quality commercial grade fittings are ideal for balconies, stair rails, dance bars, bar rails & guard rails. Made of 100% solid brass this railing flange has a tarnish-resistant powder coated RSF finish which is maintenance-FREE & protects up to 20 times longer than regular lacquers. Fits tubing size 1 1/2 in. diameter. Overall 4 in. diameter.