Description: - Thermal Expansion Experiment Tool Kit - Design to prove the effect of Thermal expansion and contraction - Great physical teaching aids for teacher - Material: Plastic and Metal - Length: 16 cm/ 6.3 inch - Color: RandomSpecification: - 1. Let the steel ball pass through the ring several times to show that the steel ball can pass through the ring at normal temperature; - 2. the steel ball for 3-5 minutes, and then pass the steel ball through the ring. At this time, the steel ball expands due to , so it cannot pass through the ring; - 3. Let the steel ball cool naturally, and the steel ball can pass through the ringPackage Includes:1 x Physical Teaching AidsNote:Due to the manual measurement, please allow 1-2mm differences in size.Due to the light and screen difference, the item's color may be slightly different from the pictures. Please understand
