Connor Towing 1621970- Class IV/V 2-1/2" Ball Mount: GTW-12000 lb. Fits Class IV/V 2-1/2 in. x 2-1/2 in. receiver 2 in. drop & 1/2 in. rise 1-1/4 in. ball hole Use 5/8 in. hitch pin or lock Black powder coated finish