1, surgical suture. the material is different: polyglycolic acid(PGA),plain catgut, chromic catgut, silk, nylon, polyester, poplypropylene and stainless steel wire. 2, suture needle. A, the end of needle varies: drilled, rolled and common. B, the shape of needle varies: 1/4 circle,1/4 circle double,3/8 circle,3/8 circle double,1/2 circle,1/2 circle double,5/8 circle,3/4 circle,1/2 curved, colt and straight. C, the point shape varies: taper cutting, curved reverse cutting, curved cutting, round bodied, blunt, spatular curved and conventional.