Surface
 * We use 100% pure Asland resin to reinforce our bathtub, no glue in the mixture(so it is more stable and much stronger than ordinary method)
 * alkali-free fiberglass reinforce
 * more even and smooth on the surface after finishing.
 * at least 3.5mm 100% new LUCITE acrylic material to manufacture Acrylic Freestanding Bathtub with 8MM thickness;
 