TEACH TEMPERATURE INVERSION: Steve Spangler's Split Demo Tank is a unique demonstration tool that will help you teach the basic principles of temperature inversion to your students. DURABLE SCIENCE EQUIPMENT: Steve Spangler's split demo tank is made from durable plastic that is convenient for any classroom demonstration and easy to carry from class to class! Manufacturered by Steve Spangler Science. PERFECT FOR YOUNG SCIENTISTS: Steve Spangler's Split Demo Tank is an essential for any mad scientist's lab! The size of the tank is 15.5x3x11 AWESOME DEMONSTRATION TOOL: Steve Spangler's split demo tank will bring classroom demonstrations to the next level! This split demo tank is perfect for classroom science experiments.