Silkann GTI Cannula® (Amar) 25G x 40mm with 23G Pre-hole Sharp Needle • Specially designed GTI Cannula for precise control through higher density and fibrotic tissue, for the subcision of minor facial surface defects • Revolutionary cannula design with grooved tip • Elegant design to optimise subcision without damaging critical bodies or vessels • Polycarbonate, screw-hub cannulas - compatible with all filler syringes.