Akro-Flex Composite Instrument Akro-Flex Composite Instrument AKRO-FLEX Akro-Flex is a remarkably flexible, ultra-thin composite instrument. By incorporating Nickel Titanium, a material known for its super elasticity, the instrument acts as a solid brush. Where to Buy x Category Dealer PartnersSales RepresentativeStrategic MarketsSchools RepresentativeAccutron™ Equipment Sales Zip Code Find RepresentativeReset Select a category, input a zip code and click on Find Representative, or explore the complete list here.