3 1/16" Service Verification Collars 50PK

As required by the 1998 edition of NFPA 10. Made of durable polymer material.

These collars are available in three different sizes. Each is a different color for ease of identification. Two smallest sizes (1 3/8" and 1 3/4") have two years molded, the larger one (2 1/8") has four.