Fulton Fas Lok Straight Class I Trailer Coupler 1 7/8" Ball 2.5" Channel 2000 Lbs. 11250 0101. The Fas-Lok latching mechanism allows quick and easy trailer hook-up and is factory adjusted for convenience. 1-7/8" Ball 2-1/2" Channel 2000 lb. weight capacity. Includes a three-year warranty. Features of Fulton 11250 0101 Fas Lok Straight Class I Trailer Coupler 1 7/8" Ball 2.5" Channel 2000 Lbs. Class I coupler Fits 1-7/8" ball Channel Size: 2-1/2" Weight Capacity: 2000 lbs. Zinc-plated for corrosion-resistance Package Contents: Fulton 11250 0101 Fas Lok Straight Class I Trailer Coupler 1 7/8" Ball 2.5" Channel 2000 Lbs. Fulton 11250 0101: Fas Lok Straight Class I Trailer Coupler 1 7/8" Ball 2.5" Channel 2000 Lbs.