Plastic band seals are fixed length seals, which create a 3 inch loop (7 inch circumference). They are affordably priced and intended for low and medium security applications. All plastic band seals feature a unique, pre-assigned consecutive serial number. They are easy to use -- just push the plastic pin into the locking mechanism. When the lock is engaged, you will hear a slight 'click'. Tug on the seal to assure the lock is engaged. And they are easy to remove. The low break strength allows the seal to be broken manually. Since cutting tools are not required, you get added convenience and added safety. SOLD IN BAGS OF 100/ 1000 CASE