This Jerry Stage JS-BP3030S is a heavy-duty alternative to our standard 10mm base plates, it is great for professional equipment that can be really heavy and take hard punishment in the event of an accident. This 30" x 30" Square Steel base plate is for standard-sized F34 square frame and F32 triangle truss. Protect your base plates with our heavy-duty material carrying bags - sold separately. Jerry Stage JS-BP3030S 30" Steel Base Plate Features: Made From Steel. Includes Conical Couplers. TUV Certified Manufacturing. Fits most manufacturers.