Sinus Lift Instrument Simion Sinus Lift Instrument Simion IMP300SIM Used during a sinus lift procedure to separate/reflect the Schneiderian membrane from the maxillary bone and to elevate the membrane. 5.8mm/3.3mm (Specific features?) 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.