Connor Towing 1621990 2-1/2" Class IV/V Ball Mount (GTW-12000 lb.) Fits Class IV/V 2-1/2 in. x 2-1/2 in. receiver 6 in. drop & 4-1/2 in. rise 1-1/4 in. ball hole Use 5/8 in. hitch pin or lock Black powder coated finish