Mullen Shower bases are roll-in showers designed for use by individuals who use wheelchairs or who have walking or lower extremity disabilities. These bases can be installed with vinyl or tile floors and feature a clamping system on two access sides that secures the base to the vinyl floor covering or the tile floor adapter to prevent leakage. Built-in tile upstands on the other two sides contribute to the integrity of the water seals. The ribbed underside enables the unit to key into the flooring to minimize slippage during installation. The unit has pre-drilled installation holes with caps for a finished appearance. Some models can be customized and installed with an optional cut-to-length kit without losing structural integrity. These bases have a non-slip surface and can use standard or pump drains. DIMENSIONS: 39 3/8 X 39 3/8 inches, 47.25 x 27.5 inches, 47.25 x 32.25 inches, 51 1/8 x 27.5 inches, 51 1/8 x 32.25 inches, 56 x 27.5 inches, 60 x 34 inches (replaces most standard US bathtubs), 70 7/8 x 27.5 inches, or 70 7/8 x 32 1/8 inches. The bases are 1 1/8 inches high and the pitch to the drain is 1 inch. CAPACITY: 419 pounds. WARRANTY: 25-year warranty against manufacturing defects.