The 18301, also known by catalog number PTL-1-423, is a roll of BradyBondz™ thermal transfer labels intended for use with TLS 2200® and TLS-PC Link™ portable printers. These square labels measure 0.250 by 0.250 inches and are made from a durable permanent polyester material. Each roll contains 750 labels. The material is UL, CSA, and AGA approved when used with the appropriate ribbon, making it suitable for certified asset tracking and product identification applications.