These GBC One Eleven Velobind Spines (111 Velobind Spines) are durable, slim and give your presentations a professional book-like finish. These spines have 11 pins with serrated spines. The GBC One Eleven binding strips are designed to work with the GBC One Eleven Velobinder System (this machine has been discontinued). Velobind One Eleven strips are available in two sizes: 100 Sheet Capacity (Approximately 1/2") and 200 Sheet Capacity (Approximately 1").