4/0, 100 Yards of Silk Black Braided Sutures on a Spool, Package of 1 - 100 Yard Spool. Non-absorbable, braided black sutures. For wound closure applications. Smoothly penetrates into the tissue. Superior handling and tying characteristics. 4-0 Silk Braided Sutures are non-absorbable sutures intended for closing wounds. These non-sterile sutures have a black dye, measure 100 yards per spool, and have a smooth surface that minimizes tissue drag.They are manufactured with non-capillary silk and have a braided design that enhances their tensile strength and effectively resists breakage during their insertion.