Specifications:

Invisible 6 middle piece +1 door

Invisible 8 middle piece +1 door

Invisible 10 middle piece +1 door

Invisible 12 middle piece +1 door

Invisible 14 middle piece +1 door

Invisible 16 middle piece +1 door

Invisible 18 middle piece +1 door

Invisible 20 middle piece +1 door

Invisible 22 Medium 1 Door

Invisible 10 medium pieces +4 small pieces +1 door

Invisible 10 medium pieces +6 small pieces +1 door

Invisible 10 medium 8 small 1 door

Invisible 12 medium piece 4 small piece 1 door

Invisible 12 medium pieces +10 small pieces +1 door

Invisible 14 middle piece +2 small piece +1 door

Invisible 14 middle piece +4 small piece +1 door

Invisible 16 medium piece 2 small piece 1 door

Invisible 16 medium piece 4 small piece 1 door

Invisible 16 medium 8 small 1 door

Invisible 22 medium piece 4 small piece 1 door