U Bolt With Heavy Duty Top & Bottom Backing Plate – Pair Technical Description Features American Metric Rod Size 15/64 in 6 mm Fixing Hole Centre 1 7/64 in 28 mm Height 1 31/32 in 50 mm Thread Length 55.11 lb 25 kg Weight 0.21 oz 6 g Inside Diameter 55/64 in 22 mm