Mersilk Suture Cutting Needle: 16mm 38cm Black 4-0 x 12Braided For easy handling and secure knot tying. Coated With wax to give hand to the suture. Does not become limp or brittle. Natural Produced from cocoons of the silk worm Bombyx Mori. Non Absorbable Provides prolonged tensile strength retention in tissue for up to 3 months.. Range Braided 7 0 to 4 (U. S. P.) Supplied as needled sutures and ligatures. Sterilisation By Irradiation.