Straight Cannula 23G x 70mm + 23G Pre-hole Needle x 25 A comprehensive range of twin-packed Silkann flexible aesthetic cannulas and Sterimedix sharp needles – designed for operational efficiency and with your patient’s comfort in mind. Each cannula with screw thread polycarbonate hub, is supplied one size smaller than the accompanying sharp pre-hole needle, giving practitioners the perfect match between cannula and needle to ensure maximum accuracy whilst maintaining optimum patient comfort.