Description Mast Gooseneck Fittings With Removable Pin Designed to be fitted to a mast between 60 and 90mm in width. Technical Description Features American Metric Backing Plate Width 2.83 in 72 mm Fixing Hole Diameter 0.20 in 5 mm Pin Diameter 0.24 in 6 mm To Suit Mast Diameter 2.36 - 3.54 in 60 - 90 mm Weight 0.15 lb 70 g