Compatible with 1"(25.4 mm) Diameter Post. Universal Size/ Fits most 1" threaded post. Threaded connector overall dimention: Diameter: 0.928"(23.58 mm), Height: 1.067"(27.10 mm) Quantity of 4 threaded connectors are included per pack. To ensure compatibility, please measure the diameter and thickness of your post before ordering. The threaded connector that is compatible with a 0.75" diameter post. To ensure compatibility, please measure the diameter and thickness of your post before ordering.