4'x2'x1' Deluxe Stacking Spacer - The Zen Habitat 3.0IN STOCK ! Our brand new line of reptile enclosures is here! Introducing Zen Habitat 3. 0. We redesigned our enclosure and our manufacturing process to create an enclosure that sets up as easily as our Meridian enclosure with the affordability of our Original enclosure line. Make the most of your space and stack your enclosures for a custom look while providing ventilation for the bottom enclosure. Our easy to assemble Deluxe Stacking Spacer for 4x2