One-sided printable for wire identification and insulation purposes Fit snugly around wires for maximum insulation protection and permanent identification Meets the rigid insulating material requirements and physical properties of MIL-DTL-23053/5 Class 1, MIL-M-81531, MIL-STD-202F, METHOD 215, and UL224 when printed with R5000 dot matrix and R4300 and R4502S (for black sleeves only) thermal transfer ribbons Meets the material and physical property requirements of SAE AMS-DTL-23053/5C (Class 1) for Insulation Sleeving and SAE AS-81531 for Marking of Electrical Insulating Materials when printed with R5000 Series dot matrix, R4300, R6600, R4502S, or R6700 Series thermal transfer ribbons UL Recognized