Steel, manganese phosphate finish, black. Rear – 1¼" (3.2cm) long, 5⁄8" (1.6cm) wide, ¾" (1.9cm) tall. 0.7 oz. (20g) weight. Front – ¾" (1.9cm) long, 11⁄16" (1.7cm) wide, 1½" (3.8cm) high, 5⁄64" (2mm) sight blade. 1.2 oz. (34g) wt. Fits 10/22® standard 18½" barrel. All mounting hardware included.