The liquid convection apparatus is made from Borosilicate Glass and is bent into a rectangle with a filling funnel. To show the convection of heat in a liquid, simply fill it with a colored liquid and place a heat source at one of the bottom corners. Glass tube is 20 mm outer diameter bent into rectangle approximately 200 x 150 millimeters. Comes in a custom package to ensure product arrives and can be stored safely. Required but not included are a support stand, clamp, heat source and colored liquid. Shipping Details Shipping Type: parcel Free Shipping: true Specifications Maximum Age: None Maximum Grade Level: None Allergens: Contains No Allergens Certifications: Not Applicable Grade Level: Grades 5-12 SUOM Description: Each Age Range: 12 and Up Brand Name: United Scientific Description: Convection App