... , value D 17 kn, value S 205 kg. • 50 mm Forged Tow Ball fits for Two-bolt Flange Towbar• Finish: Zinc ... long way in this industry since 1998. Rongchang products include forged hooks & shackles, tow ropes & straps, hitch balls, ball mounts, trailer couplers ... , trailer connectors, bike racks, etc. Zinc Plated 50 mm Forged Tow Ball fits for Two-bolt Flange Towbar