Thermoset Ball Knob Machine Handle Smooth Rim Description This Ultra-solid ball knob with a Shiny finish, suitable for general application,such as lawn mowers, exercise equipment, machinery, valves, spigots, etc; And the Ball knob Injection molding,Bakelite material, feels good; Tightly molded-in insert insures optimal durability and functionality; The round smooth surface gives a dressed-up finished appearance. Ideal lever knob for machine handles. Specification Mounting Thread Size:M10 Spherica Dia:35mm/1.38inch Color:Black Handle Material:Bakelite Rim Style: Smooth Mounting Type:Female Thread Hight Quality The handle is made with premium quality and has excellent electrical insulation,oil resistance,weak acid resistance,alkali resistance and general solvent resistance,and has excellent mechanical properties such as toughness,rigidity,good rigidity and balance.