Plaster and Stucco Products This is used in the concrete masonry unit. When ordering use the Purchase Order function at checkout and enter ROCK as your payment method. This will allow you to create an order for a firm transportation quote without having to pay for it at this time. While we have posted transport rates, in many circumstances, we are able to ship the order to you for less. You will be given a firm cost on the whole order within a few minutes to a few hours.