Hamilton brand borosilicate glass syringe model 1750 with .5mL capacity, Gastight SampleLock syringe with Removable Needle. Sample product was never used in the field. SampleLock design allows the user to sample a gas or liquid sample, turn the valve on the end of the syringe, and transport the sample safely to the lab for analysis without worries of contamination. Does not include the needle or original box.