Part #27
Part #27 is often known as Window 1 x 2 x 1. 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 2 x 1 Classic with Solid Studs (Complete)
Category
Unknown
Author
Tore Eriksson [Tore_Eriksson]
Status
official
Available variations
Name
Window 1 x 2 x 1
Category
Window
Weight
0.49 gram
Size
1 x 2 x 1
Available variations
Name
Window 1 x 2 x 1
Category
Windows and Doors