Consisting of a plastic cup with Φ63mm at top and Φ57mm at bottom x 85mm high, thickness of 2.3mm, 2 suction hooks inside, a spring Φ12mm x 24mm,a 5 ml plastic syringe

Science Teaching Kits School Lab Equipment Suppliers in India 

Ltekonline are the manufacturers of Air Pressure Demonstrator Science Teaching Kit used to demonstrate engineering principles in Engineering Colleges, Engineering Schools and Science Teaching Kits for Engineering Teaching Lab in Universities