Rubber molds have the abrasion resistance and tear strength needed to keep production moving. Casting concrete into rubber molds lets you make perfect copies of any original every time! Molds are ready for casting same day and last in production...saving you time, labor, and material costs. Urethane molds are used everyday by professionals to make architectural elements, concrete stone veneer, formliners, concrete countertops, GFRC panels, concrete statues and furniture and the list goes on. These molds can be used over and over. You are purchasing 4 cavity urethane rubber mold designed for casting plaster, concrete and polymer concrete. Molds measurements are 24” X 23” X 1.5” inch. Approx. size of each cavity 23” X 5”X 1". GlobMarble’s rubber molds are self-supporting, unlike plastic molds. No back-up, support shells are required. These molds are easy to use, and each purchase comes with an instruction sheet with information and tips on: mixing and pouring concrete, coloring the stone, releasing the castings. See our other items We manufacture all of our own products and have an unlimited supply. If you need more, let us know, we will get right back to you with pricing. If you need to buy more than 1 mold, let me know I’ll combine post charges We ship international, please contact us for shipping quote. We do not ship or deliver orders on Saturday or Sunday We also make custom molds.