Specifications:

White five layers [with pen container]]

Black five-layer [with pen container]]

White four layers [with pen container]]

Black four-layer [with pen container]]

White three-layer [with pen container]]

Black three-layer [with pen container]]

White-single four-layer [with pen container]]

Black-single four-layer [with pen container]]

White-single three-layer [with pen container]]

Black-single three-layer [with pen container]]

White-single second floor [with pen container]]

Black-single second floor [with pen container]]

White five-layer

Black five-layer

White four-layer

Black four-layer

White three-layer

black three-layer

White-single four-layer

Black-single four-layer

White-Single Triple Layer

Black-Single Triple Layer

White-single second floor

Black-single second floor

White-Single [top compartment]]

Black-single [top compartment]]