Thermal Printers and Label Part Numbers Label Printer Label Part Number Label Size Label Core Size Label Type Sato Ws412/Ws408 RL785TW 4"x6" 1" Glossy Zebra Zdesigner GK420d RL785DW 4"x6" 1" Matte Zebra ZP450 (UPS Printer) RL963DW 4"x8" 1" Matte Sato Ws412/Ws408 RL777TW 2"x1" 1" Glossy Zebra ZQ630 Plus (Hand Held Printer) S-13029W 4"x6" Matte