The Simpson Strong-Tie ITS2.56/11.88 I-Joist Hanger is a steel fastener designed for use with 2-1/2 to 2-9/16 inch I-joists. This hanger comes in a pack of 25, with each hanger measuring 2-5/8 inches in length and a rail height of 11-13/16 inches. The finish is zinc galvanized, providing corrosion resistance for durability. The product is made by Simpson Strong-Tie, a trusted brand known for high-quality fasteners and hardware.