Whirlpool, Air or Soaking Bathtub?
Most tubs listed come with the possibility of a variety of systems from tub only to whirlpool & air combination. The description will list all the possibilities.
72" x 38" + Drop-in & Undermount Bathtubs
Tubs are listed by size: first by length, then by width, then by height - smallest to largest
72" x 38" - 72" x 40" Drop-in & Undermount Bathtubs