Size:1. Epidural Anaesthesia AS--E 2. Lumbar Anaesthesia AS- S 3. Nerve Block AS--N 4. Epidural and Lumbar Anaesthesia AS- E/S. This product conforms to the specifications of YY0321 .1 --2000.It adopts excellent accessories and has reliable functions. It can avoid latrogenic infection.Its unique diffusion paper pack can ensure the product asepsis and apyrexia. lt's mainly used for puncuring and infection of epidural cavity block,subarchnoid block,and nerve block etc.