K-N Sinus Lift, Large/Small, 47-Degree, Black Line K-N Sinus Lift, Large/Small, 47-Degree, Black Line Sign in to save to your list 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 Ask a specialist