This is a connector part from TE Connectivity (formerly Tyco Electronics). It is a 3-pole modular housing, which is used with a wide range of TE Connectivity modular plugs and receptacles. The modular housing is made of thermoplastic, and is sealed to provide protection from a wide range of environmental conditions. It is available in a variety of colors, including black, gray, ivory, white, and gray/black. This part is UL recognized, and is rated at 25A and 600VAC/VDC. It also has a temperature range of -25C to +85C, making it suitable for a wide range of applications.