HP B300 PC Mounting Bracket, 11.2 oz (318 g), 9.7" (246.3 mm), 4.53" (115 mm), 2.04" (51.9 mm), 11.2" (285 mm), 5.31" (135 mm) HP B300 PC Mounting Bracket. Weight: 11.2 oz (318 g), Width: 9.7" (246.3 mm), Depth: 4.53" (115 mm). Package width: 11.2" (285 mm), Package depth: 5.31" (135 mm), Package height: 3.35" (85 mm)