Green MallRScrew Storage caps, septa, and vials are designed especially for use with Agilent's and other rotatingor robotic arm samplers . Storage vials are made of Type 1Class A or Class B borosilicate glass . Caps are made of highquality polypropylene and septa only use the highest qualitymateriais to ensure proper function and can be pre-slitted for easier needle penetration. Designed for single injection and/or short sample cycles, particularly for LC applications Absence of elastomer layer reduces potential contamination.