ALFI brand ABCO71TUB 71" Solid Concrete Rectangular Freestanding BathtubALFI brand 71 Solid Concrete Rectangular Freestanding Bathtub (ABCO71TUB) Transform your bathroom into a refined spa like retreat with the ALFI brand ABCO71TUB 71 Solid Concrete Freestanding Bathtub. Elegant, sculptural, and built to last, this modern soaking tub delivers exceptional durability paired with a smooth matte interior and exterior finish. Concrete soaking tubs have become a hallmark of luxury bathroom design. Their ability to retain heat