Get a 360–degree view of growing plants from the roots up! Ideal for science fair projects, this set of three growing tubes is a no-soil, mess–free way to explore hydroponics with water or any media. # Pieces In Set: 8 Learning Skill: Science Measurements: 7.75 Depth/Inches, 10 Length/Inches, 3.75 Height/Inches Base Material: 100% Metal Care: Wipe Clean Country of Origin: Imported p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 15.0px Calibri; -webkit-text-stroke: #000000} span.s1 {font-kerning: none} WARNING: CHOKING HAZARD – small parts. Not for children under 3 years.