The TE Connectivity/Polamco part 91H1-25-18-1-B-HE400 is a high-quality Spring Backshell designed for MIL-DTL-38999 III/IV Circular Connectors Shell Size 2. Made from durable aluminum alloy, this straight backshell ensures secure cable connection and strain relief for optimal performance in demanding military and aerospace applications. Trust in TE Connectivity/Polamco for reliable and robust connector solutions.