The 127BT05 3/16 (9/16-18) X Towed Trailer Brake Tee Inverted Flared Seat is a specialized hydraulic fitting designed to split brake fluid flow evenly between multiple brake lines in a trailer’s braking system. It ensures consistent and balanced braking performance by properly distributing hydraulic pressure from the master cylinder to the trailers brake assemblies. Typically made frombrass or steel, this T-fitting is essential for maintaining safe and efficient braking in single, tandem, and triple-axle trailers.