Ultra-Tow Class IV Double Ball Mount - Includes 1 7/8in. & 2in. Balls 6,000 lb. maximum gross trailer weight (GTW) and 600 lb. maximum tongue weight (TW) when using the 1 7/8in. ball 7,500 lb. maximum gross trailer weight (GTW) and 750 lb. maximum tongue weight (TW) when using the 2in. ball Durable black powder-coat finish on mount and balls adds corrosion-resistance