Sea-Dog Nylon Top Insert - Black - 3/4". Top Fittings create an attachment point and function as a pivot point as part of a Bimini top system. Pin size 1/4. Constructed of UV stabilized injection molded nylon. Available in black or white. Stainless tube wall thickness 0.049. Features of Sea-Dog Nylon Top Insert Injection Molded Nylon Top fittings function as a pivot point for your canvas top Tube Dimensions: 7/8" Pin Size: 1/4" Package Contents: Sea-Dog Nylon Top Insert Sea-Dog 273175-1: Nylon Top Insert - Black - 3/4"