Silk suture 4-0 DA-1 needle VB, 45 cm black filament 12 sutures Non-absorbable - biological - multifilament. A non-absorbable, sterile, surgical suture composed of anorganic protein. It is braided for easy handling and secure knot tying. A wax coating gives "hand" to the suture. The silk suture provides tensile strength in tissue for up to 3 months. It is coloured black or ivory. Manufacturer: Ethicon / Johnson & Johnson