OUTSIDE CORNER 90 degree RAILS consist of two parts - the Solid Aluminum Curved Rail and the Double Roller Bracket that attaches to the ladder. Both 16 in wide and 20 in. wide brackets are available in Satin Nickel, Hammered Antique Brass, Oil Rubbed Bronze, and Black. NOTE: Use this product with DOUBLE ROLLER CURVED TOP GUIDES - QG.700, QG.710, QG.720, QG.740, QG.700-20, QG.710-20, QG.720-20, QG.740-20.