1717269-1 is an insulation sleeve for the POSITIVE LOCK EX Series 187 Flag Type receptacles, engineered to accommodate wire insulation diameters ranging from 1.7 to 4.32 mm. The sleeve is constructed from soft PVC material with UL94V-2 flame rating and features a blue color for easy identification. It is designed to work with applicable contact part number 175019-1 and provides reliable insulation protection in terminal and splice applications. This sleeve is commonly used in electrical connector assemblies where flame-retardant insulation and secure wire retention are required, offering dependable performance in industrial and automotive wiring harnesses.