This is a house for centipedes. Size (overall): W130mm x H106mm x D95mm (Interior): W100mm x H100mm x D60mm The material is MDF. It can withstand some water, but it is not a very water-resistant material, so it should not be submerged in water. It is not suitable for use in humid tanks, as it may swell or develop mold. In my house, my corn snake only goes inside the house when it sleeps. It seems to be comfortable. Thank you for looking.