Carolina Gym Supply Rainbow P-Bar BlocksUS Patent #4968025 The Carolina Gym Supply Rainbow P Bar Blocks is a true Carolina Gym Supply original! We started with the Original Style and have since expanded our Rainbow P Bar Block line to become the "go to" training aid in your gym! The patented construction of our Rainbow P Bar Blocks gives them a very solid and stable exterior, but are the lightest on the market coming in at under 50 lbs for each full size block! Your athletes will have no