Label Cartridges for Portable Hand Held Thermal Transfer Labeling Systems offer cost effective fast and durable label solutions for all of your labeling needs.;Flatten Polyolefin Heat Shrink markers for highest performing temperature, chemical resistance, insulation & durability ratings;Preferred for wire & cable, hydraulic/pneumatic tubing labeling applications where insulated, durable & readable legends are required;5 foot lengths;MIL-STD-2026, MIL-M-81531, SAE-DTL-23053/5 (Class 1&3) UL 224