Check the listing for details. Ball Knob 32mm diameter M8 tractor control lever lathe hydraulic 360 digger jcb. Condition: New, Made in China. Listed at 6.95 USD. Check out my other items! Be sure to add me to your favourites list! Threaded Ball Knob Female (moulded thread): Material: High impact resistant thermoplastic Standard Colour: Black Matt finish thermoplastic. The UK supplier has been manufacturing plastic machine knobs since 1927. Today they supply one of the most comprehensive ranges of thermoplastic and phenolic (Duroplast or Bakelite) knobs available. From clamping knobs and grip knobs, to spinner knobs and ball knobs, it is very likely we have a suitable knob for your application Discounts for larger orders Any questions please ask Check out my other items. Ball Knobs, Scallop Knobs, Bridge handles, Star knobs, Wing knobs, Clamping handles Medical aids and equipment Industrial machinery .Aerospace equipment Packaging and process.