The Ratio CLICK CARTRIDGE GRIP fits all hands. It supports a natural ergonomic and comfortable position of your hand. Fully autoclavable and acid resistant. Fits all common cartridges in the market. For an outstanding performance use the Ratio Soft Grip Cartridges. 30mm at the widest point of the grip. Colour: Black Material: Aircraft aluminum and stainless steel parts. • Ergonomic design for the best comfort • Works with all kinds of machines • Traditional 8mm tube or Cheye**e type machine • Two plunger bars and adapter knob included Might be the most universal grip on the market WARNING! - DO NOT USE ULTRA SONIC CLEANERS