1. Air wye branch 2. 4 x 4x 4'', 6 x 4 4'', 6 x 6 x 6'', 8 x 6 x 6'', 10 x 8 x 8'', 12 x 10 x 10'', 12 x 12 x 12'' avaiable Air Wye Branch Features:* Our Wye Branches are made from a heavier guaged galvanized steel, thicker and more heavy duty than other competitive fittings on the market. Package:* Cases are packaged in corrugated boxes for easy handling and protection Sizes:* 4 x 4x 4'', 6 x 4 ...