Sutures 5/0 Chromic Gut Chromic Gut Look Sutures are absorbable, sterile surgical sutures composed of purified connective tissue derived from either the serosal layer of beef or the submucosal fibrous layer of sheep intestines. Indicated use includes in general soft tissue approximation and/or ligation. For oral and periodontal surgery Sterile Sutures have a 1015 day resorption. Sutures. Chromic Gut. 558B 4-0 18" C-6 3/8 Circle 19mm