About This

• incredible tool for laboratory use or as a decoration in your laboratory more efficient at learning from experiments ..
• The empty box barometer is an empty crate group which axially moves when changing the air pressure ..
• The tool parts consist of a head plate, a vacuum capsule, a connecting rod, an adjusting screw, an intermediate shaft, an adjuster, a sector gear, a spur gear, an eccentric screw, a spiral, a pointer and a dial and a fastening screw ..
• The instrument should be handled with care, do not collide and stored after use in a cool, dry place ..
• Suitable for use in schools, educational displays and collectibles, is also a great addition to your laboratory supplies.