1.5mL amber silanized glass vials (no caps) with writing patch and approx. 500uL gradations. 1.5ml short thread vial, 12 x 32mm, clear glass, 1st hydrolytic class, wide opening (9mm.) Use caps with PTFE/silicone standard or pre-slit septa, or PE septumless cap. Note that the septumless cap is NOT resealable.