Screw Storage caps, septa, and vials are designed especially for use with Agilent's and otherrotating or robotic arm samplers . Storage vials are manufactured of Clear, Type 1 Class A or Amber, Type 1 Class B borosilicate glass . Caps are made of high quality polypropyleneto exact manufacturing tolerances and lined in a controlled manufacturing environment . Our septa only use the highest quality materials to ensure proper function and can be pre-slit to ease needle penetration. Designed for single injection and/or short sample cycles, particularly for LC applications Absence of elastomer layer reduces potential for contamination. Features: Volume/Capacity:� 20ml, 40ml, 60ml (Normal Volume) Feature: 27.5*57mm, 27.5*75mm,27.5*95mm, 27.5*140mm vials, 22*3/22*1.5mm PTFE/Silicone septa, 20mm PP screw cap Qty/Pack: 100/pack z Model:� Storage screw-thread vials