4-0 Silk Black Braided Suture Spool Non-Absorbable 100Yds4 0 Silk Black Braided Suture Spool, Non Absorbable Nylon Monofilament Nylon Monofilament is made up of black and clear monofilaments that are smooth and nonporous. This material has excellent tensile strength and provides ease of passage through tissue while at the same time reducing trauma to surrounding tissue, preventing tissue in growth. Silk Black Braided Silk Black Braided suture has optimum handling characteristics and knot security without