Specifications: -Acrylic with fiberglass reinforcement. -Overall dimensions: 37.5&quot; H x 51&quot; W x 30&quot; D. Soaker Bath Tub Specification Sheet Extension Kit Features: -Bath tub extension kit. -White finish. -Acrylic construction. -Easy assembly. -Works with all tub configurations: soakers, jet massage, air massage and dual massage . Tub Heater Features: -In-line whirlpool heater. -Addition for Acrylic or Gelcoat bath tubs. -Metal construction. -Easy assembly. -1500 watt heater.