Thermal print tray tags with optical sensor (punched hole) separation at center of tag (See Image).  Simple to load, easy to use, and reliable performance.  Roll size is 1100 tags per roll. 

ITEM# ZEBRA 1100
Color: White
Format: Rolls
Core Size: 1″
Tag Size: 3.25″ x 2″
Tags per Roll: 1,100
Rolls per Box: 10
Quantity: 11,000