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 25mm/ 0.98 inch Mounting Thread Size: M10 Spherical Diameter: 35mm/ 1.38 inch Material: Thermoset Rim Style: Smooth Package Content: 4 Pcs x Ball Knob