Qingdao Gofai Rubber can produce solid rubber ball, rubber ball with hole. size is from 1mm to 100mm,etc Mateiral: NBR /EPDM/Silicone/FKM/Viton, etc It is widely used in food/industril/medical/ machine sealing, etc. Customized size/color /shape approved. If you are interested in it, please contact with: chinarubber@aliyun.com

Made of rubber.
Fast EASY way without costing a fortune.
It is a nice alternative to the expense of milling a bolt for a custom knob. Makes gripping and cycling the bolt easier, can do it in the web of your thumb/index, don't even need to grip it.

Anti Vibration Damping Vibration Screen Colorful Super Bouncy Soft Rubber Silicone Ball with hole hollow Made of heavy duty rubber for maximum durability and long term use Easy to clean; rinse in water and air dry Welcome you mail back to me for detail. Grace Zhao grace@gofairubber.com