1.1 Divided by function: ordinary bathtub and massage bathtub.
1.2 Divided by shape: bathtub with skirt and bathtub without skirt.
1.3 Divided by material: cast iron enamel bathtub, steel enamel bathtub, glass steel bathtub, artificial agate and artificial marble bathtub, terrazzo bathtub, wooden bathtub, ceramic bathtub, etc. Cast iron enamel bathtubs, steel enamel bathtubs and glass steel bathtubs are commonly used.
