Part #29
Part #29 is often known as Window 1 x 1 x 2. We know this part is available in LDraw, Bricklink and Rebrickable. You can buy it on Amazon or Bricklink.
How to find this part
Name
Window 1 x 1 x 2 Classic with Solid Studs (Complete)
Category
Unknown
Author
Tore Eriksson [Tore_Eriksson]
Status
official
Available variations
Name
Window 1 x 1 x 2
Category
Window
Weight
0.49 gram
Size
1 x 1 x 2
Available variations
Name
Window 1 x 1 x 2
Category
Windows and Doors