Environmentally sealed PHD Model 38999 withstands rigors of avionics and military applications. Metallic shell options include nickel-plated, cadmium-plated, and anodized aluminum, stainless steel, and specialty alloys. Connector accepts single mode, multimode, and plastic fiber types. Optical channel counts range from 1-72 channels. Unit comes in shell sizes from 11-25 in jam-nut or flange mount configurations.