Description: Fittings are made from High Quality, Marine Grade 316 Stainless Steel Allows for quick and easy installation and removal Heavy-duty, Durable, and Non corroding material Cap Inner Diameter: Approx. 22 mm / 0.87 inch For pipe: 7/8 inch Package Includes: 1 Piece Bimini Top Eye End Ball Note: Please allow slightly difference due to manual measurement. Color may be slightly different since different monitor. Thanks!