12 inch Tarantula Cube

 
This enclosure is very sturdy. Made from 5mm acrylic, plenty of ventilation and extremly strong magnets. 
Acrylic is 10 times stronger and 23% clearer than glass. Acrylic is also a good insulator, so you don't lose as much heat as you would with a glass enclosure. 
a 360-degree view so you can admire all aspects
 
Caution: Magnets are extremly strong. Keep away form children. Enclosure lid will shut very tightly and can pinch fingers.  Keep away from medical devices such as pacemakers.