Your Shopping Cart Continue shopping “Springfield KingPin™ Unintentional Detach Retention Cup – Plastic” has been added to your cart. Continue shopping “Springfield Plug-In™ Locking Air-Ride Post – 14-1/4″ to 21″” has been added to your cart. Item Your Options Quantity Price Springfield KingPin™ Standard Square Steel Base w/Brass - 7"x7" Springfield KingPin™ Standard Square Steel Base w/Brass - 7"x7" quantity $82.99 × Springfield KingPin™ Unintentional Detach Retention Cup - Plastic Springfield KingPin™ Unintentional Detach Retention Cup - Plastic quantity $4.99 × Springfield Plug-In™ Locking Air-Ride Post - 14-1/4" to 21" Springfield Plug-In™ Locking Air-Ride Post - 14-1/4" to 21" quantity $276.99 × Coupon: Apply coupon Update cart Continue Shopping Cart totals Subtotal $364.97 Sales Tax $21.90 Total $386.87 Proceed to checkout