Lifegard Rimless Terrarium / Paludarium is made with Ultra Low Iron 92% crystal clear glass that allows you to easily combine the elements of natural earth landscapes with exotic underwater environments to make breathtaking displays and arrangements. The use of German glue on the joints makes the corners blend into the structure without restricting the view. Lifegard is the first company to make terrariums with curved sides. This adds an additional dimension to the look and also adds more depth and viewing area to your setup. This was a difficult task but Lifegard was able to achieve it. Every Lifegard Terrariums / Paludariums comes with two bulkhead fittings with elbows and a black leveling mat for improved stability and insulations. The two bulkhead fittings and elbows allow connection to an external filter. The two predrilled 30mm holes on the back can be used for plumbing, adding water features or keeping electric cords hidden from coming over the walls. The bulkheads are removable. Dimensions: Length: 18.90" Width: 8.86" Front Height: 5" Back Height: 11.54" Top Corner Length: 4.43" Opening Diameter: 30mm Glass thickness: 5mm Volume: 3.6 gallons Includes: Low iron glass Terrarium / Paludarium Two bulkhead fittings Two elbows Leveling insulation mat