No matter what your needs, we have a unit for you – straight, 9″ offset and 16″ offset. All available in either round tube or square. The offset couplers keep the weight on the ball. Our patented self-latching couplers fit 2 5/16″ gooseneck balls. The GN8 Coupler head is rated at 28,000 lbs, however the GN1, GN2 and GN3 are rated at 24,000 lbs.