Curt Manufacturing 40005 Trailer Ball, Silver Fits 2 5/16" couplers and accepts up to 7,500 lbs. GTW Constructed from high-strength, hot-forged steel Protected by a durable chrome-plated finish Zinc-plated hex nut and helical lock washer for secure mounting Features fine threads for superior holding strength Ball Diameter 	- 2.3125, Shank Diameter -1, Shank Length 	2 1/8 IN