3. The Plunger is made of medical entironment-protect and natural rubber. 4. The syringe is consisted of the barrel, the plunger, the piston, the needle hub, the needle tube, and the
3. The Plunger is made of medical entironment-protect and natural rubber. 4. The syringe is consisted of the barrel, the plunger, the piston, the needle hub, the needle tube, and the needle protective cap. 5.Sufficiently transparent barrel allows easy measurement of the volume contained in the syringe and detection of air bubble. 6.