Ultra-solid ball knob with a Shiny finish, suitable for general application,such as lawn mowers, exercise equipment, machinery, valves, spigots, etc. Product Name: Ball Knob Mounting Type: Female Thread Thread Depth: About 11mm/ 0.43 inch Mounting Thread Size: M5 Spherical Diameter: 16mm/ 0.63 inch Material: Thermoset Rim Style: Smooth Package Content: 10 Pcs x Ball Knob