The function of the hinge is load-bearing. The normal use of the glass shower door is achieved by hinges, so the material of the hinge must be very hard to better bear the weight. It is well known that the hardness range is stainless steel > brass > aluminum alloy. Therefore, it is better to use the stainless steel 304 material to make it more durable and safer. At the same time, the brass and aluminum materials have been oxidized and easily faded in the damp environment of the bathroom. While 304 stainless steel material can guarantee a long-term luster.