Description Natural absorbable gut suture Excellent knot security Very high tensile strength Improved pliability and flexibility Composition: Natural Purified Collagen Absorbtion Type: Absorbable Structure: Natural Thread Color: Brown Materials for absorbable and nonabsorbable surgical sutures ... 1 . Plain catgut , 1 . Submucosa sheep intestine. 2. Chromic gut, 2. Serosa of beef intestine The manufacturing of catgut raw material, consisting of long ribbons of highly selected serosal tissue, ensures: Purity of collagen for optimal tensile strength and in vivo performance, Uniform treatment with a buffered chromium salt solution, Surface smoothness to facilitate knot run-down and knot strength.