Curt Trailer MFG. A - Frame Coupler. For secure connections while you travel, grab a A-Frame Coupler! Features a lockable latch for peace of mind on the road. Durable zinc finish to keep it lookin" good for years! Comes with manufacturer"s 3-year warranty. Tongue Load (lbs.): 700, Latch Style: Posi-Lock, Gross Load (lbs.): 5,000, Description: 2" Ball A-Frame, Dimensions: 4 x 10 x 13-3/4", 6.8 lbs. Order, right here! Curt Trailer MFG. 4" A-Frame Coupler, 2" Ball