The Ultimate in Transparency. Tarantula Cribs Clarity. The Treehouse provides complete transparency. Our clearest arboreal enclosure yet, with 360 degree views. Optimized for tarantulas and spiders that prefer well lit enclosures such as jumping spiders. This is where clarity meets quality. Length: 4 InchesWidth: 4 inchesHeight: 6 inchesVentilation: Cross Ventilation, 4mm. ..