Description: OverviewThe instrument is designed according to the physics, and it tells the relationship between pressure and volume when a certain mass of gas is in an ideal state when it is warm and constant. Structure This instrument consists of a scaled gas chamber, pressure gauge, air release valve, base, etc. Easy to UseThe Physics Teaching Model instrument is easy to operate, intuitive to demonstrate, obvious effects and great visibility. STEM Educational Toys SetBoyle's Law Demonstrator Pressure and Volume Relationship Demonstrator physics experiment model for home, school, great educational learning toys for children. Science SetThe physical experiment set can improve kid's interest in physics, strengthen children's knowledge of physical, and improve their hands on and thinking skills. Specification: Material: Metal, PP Size Chart: 28cmx12cmx17cm/11.02inchx4.72inchx6.69inch Package Includes: 1Physics Teaching Model Set Note: Please allow slightly errors due to manual measurement and different monitors.