Towing Ball Mounts BM2 2" Drop or 1" Rise 8" length*, 6 lbs. BM4 4" Drop or 3" Rise 10" length*, 8 lbs. BM6 6" Drop or 5" Rise 15" length*, 12 lbs. * length measured from pinhole to ball hole centers        Easy Installs into a 2" Square Receiver        5,000 lbs. Gross Trailer Weight        Reducer Spacer included (3/4" Shanks)        500 lbs. Vertical Load        Allows a Variable Height Adjustment   Vertical Flex Trailer Hitch Kit      Complete Kit        All necessary parts included        Easy installation - Fits all standard 2" receivers        Weather-resistant key lock assembly      Deflection Angle        Over 200% range-of-motion improvement        Solves problems with steep grades        Ideal for vehicles with long rear overhangs        Perfect for off-road camping & boat launches      Quieter, Cushioned Ride        Buffered with automotive grade polyurethane        Reduces common receiver noise        Minimizes wear & tear on coupling mechanism    R-80  (Vertical Flex Hitch Kit w/ 2" Ball Size)    R-81  (Vertical Flex Hitch Kit w/ 1-7/8" Ball Size) Vertical Flex Hitch Sold Separately    R-90  (with 2" Trailer Ball)    R-91  (with 1-7/8" Trailer Ball)    R-88  (No Ball Included)