Shampoo Unit is a product category that includes salon backwash units, shampoo backwash units, and salon backwash chairs. The salon backwash unit is designed for washing and rinsing hair, with a built-in sink and water supply system. The shampoo backwash unit is similar to the salon backwash unit, but it also includes a massage function for added relaxation. The salon backwash chair is designed with adjustable height and backrest to provide comfort for both the stylist and the customer. These products are specifically designed for hair salons and are made with high-quality materials to withstand frequent use.