Color:

Two-layer short (without pulley)

Three-layer short (with pulley)

Four-layer short (with pulley)

Five-layer short (with pulley)

Six-layer short (with pulley)

Seven-layer short (with pulley)

Eight-layer short (with pulley)

One high and two low [can put tall bottle] with pulley

One high and three low [can put tall bottle] with pulley

One high and four low [can put tall bottle] with pulley

Two high school and two low [can put high bottle] with pulley

Two high and four low [can put high bottle] with pulley

Three-layer high Model [can hold tall bottle] with pulley

Four-layer high Model [can hold tall bottle] with pulley

Five-layer high Model [can hold tall bottle] with pulley