1) Acrylic/ABS Bathtub Aqua Hydra Massage Bathtub Hot Tub 2)Certificate: CE,RoHS,LVD,EMC, ISO,UL, TUV 3)Material: ABS/Acrylic AUTME ABS/Acrylic ... formaldehyde detergent!2. How to remove the scratch from the bathtub surface: Use 1500# sand paper to polish the scratch surface ... detergents such as lemon juice, vinegar sauce4.Heat tolerance: the bathtub cannot touch the heat source which is higher than 80 ...