DescriptionSpecificationsDescription5/16-18 Bolt Thread, 3-3/16" Long x 1-5/8" Wide x 1-1/2" High Stud Mount Leveling Pad & Mount 45 Max Lb Capacity, 1-1/4" Base DiamSpecificationsManufacturer Item No.ND-A-BLACKManufacturer NameMason Ind.