From the material, the bathtub is divided into acrylic, steel and cast iron. 1. Acrylic bathtub: Made of man-made organic material, characterized by rich shape, light weight, good surface finish, and low price, but due to the existence of poor high temperature resistance of artificial organic materials, poor pressure resistance, no wear resistance, and easy aging of the surface The disadvantage is that the acrylic bathtub is easily discolored when used for more than three years. 2. Steel bath tub: It is a traditional material for making bathtubs. The steel plate cylinder is made of a special steel plate with a thickness of about 2 mm for the whole body, which is stamped and formed. The surface is then treated with an enamel treatment. It is wear-resistant, heat-resistant and resistant. Pressure and other characteristics, the weight between the cast iron cylinder and the acrylic cylinder, the insulation effect is lower than the cast iron cylinder, but the long service life, the overall cost-effective. This cylinder is enamel surface, not hydrophilic and oil, so the surface finish and hardness is very high, very wear-resistant scratch resistance, and is not easy to adhere dirt, very easy to clean. 3. Cast iron cylinder: Made of cast iron, the surface covered with enamel, so the weight is very large, it is not easy to produce noise when used; due to the more complex casting process, so the cast iron cylinder is generally more uniform and the price is very expensive. Because cast iron cylinders are heavy and difficult to move and handle, the installation process is troublesome. However, due to the thick wall of the cylinder, the cast iron cylinder is characterized by its excellent insulation properties. to sum up: 1. Acrylic Bathtub: The advantage is cheap, good insulation, the disadvantage is easy to change color, another drawback is that it is easy to hang dirt, not clean. There is a lot of noise when the water is released. 2. Steel plate: The price is middle, it is not easy to hang dirt, easy to clean, not easy to fade, lasting luster. But the insulation is not good. Noise is centered when the water is released. 3. Cast iron bathtub: It is not easy to hang things, easy to clean, good insulation; but the highest price. There is little noise when the water is released. The highest grade of cast iron, followed by acrylic and steel plates. Bathtub Hex Flange Head Bolts,Flange Head Bolts,Hex Flange Screw,Hex Flange Head Nantong Romax Hardware Co.,Ltd. , https://www.hardwarehouse.cn