This is a new Meyer OEM EZ Plus Plow Mount 17174. This Mounting Carton is used on 2011 and later GMC & Chevrolet C/K Series K2500, K2500HD, K3500 Series 4 x 4 Models.
The Mounting Carton includes the underframe, right-hand mount weld, left-hand mount weld, handle bolt and the hardware bag.