1. They are made of 5mm anti-slide Acrylic panel, so their thickness is adavancedin Chinese sanitary ware companys.2. They have 18 trans-frequency massage ways, such as trans-frequency pusle massage,surfing massage, single massage wave-length and so on, which is self-createdhigh technique.3. They are self-developed designs according to the market demands. producing area:Guangzhou, China payment:T/T