24PCS ASSORTED MIXED SUTURES - Our suture practice kit consists of 24 mixed training threads. They are non-absorbable suture threads of different material and size: Nylon: 2/0, 3/0, 4/0, 5/0; Polyester: 2/0, 3/0, 4/0, 5/0; Polypropylene: 2/0, 3/0, 4/0, 5/0; Silk: 2/0, 3/0, 4/0, 5/0.