67 in. Stone Resin Flatbottom Solid Surface Freestanding Soaking Bathtub in White with DrainThis 67 in. Stone Resin Flatbottom Solid Surface Freestanding Soaking Bathtub in White with Drain is crafted from durable high quality aluminum powder and Solid Surface Stone binder (PMMA+MMA+UPR). With proper maintenance indoors, it can provide 5 8 years of use due to its hard material and high toughness. Its low heat transfer coefficient allows for better insulation and slower dissipation of heat, resulting in a more comfortable soaking experience.