Noble Co. offers Pro-Slope, a preformed composite designed to create a Uniform Plumbing Code-required slope needed under shower pans. Pro-Slope is sloped in all directions to the center, can be cut to size with a knife, and is available in two sizes: 40" by 40" and 60" by 60". The kit includes a Positive Weep Protector , to help ensure proper drainage. Circle 326 on the Reader Inquiry Card.