The Curt Manufacturing weight distribution hitch is a specialized towing system that provides improved vehicle and trailer control by leveling the trailer and more evenly distributing its tongue weight across the trailer's and vehicle's axles. Weight distribution hitches are commonly used on travel trailers and campers but can also be applied to other large loads.This replacement spring bar is designed to fit the Curt Manufacturing trunnion bar weight distribution hitch #17345. It features forged steel construction and a durable powder coat finish for long-lasting use. It offers a gross trailer weight capacity of 3,000 - 5,000 lbs., a tongue weight capacity of 300 - 500 lbs. and comes with a pre-attached spring bar chain for convenient installation and tension adjustment.