Features of the Kendall DEVON Surgical Skin Markers: The DEVON Surgical Skin Markers are sterile, single use markers designed to meet the specialized needs of today's surgeons. All of Kendall's skin markers are non-toxic, non-smearing with non-irritating Gentian Violet ink. DEVON surgical skin markers help your facility meet the needs of correct site marking. The product referenced on this detail page is sold be 25/Bx.