K-N Sinus Lift, Large/Small, 47-Degree, Black Line K-N Sinus Lift, Large/Small, 47-Degree, Black Line IMP6578SX Used during a sinus lift procedure to separate/reflect the Schneiderian membrane from the maxillary bone and to elevate the membrane. 4.1mm/7.6mm 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.