Screw-thread sample vials are manufactured from either clear 33 expansion borosilicate clear glass (Type 1, Class A) or 51A amber glass. Vials maintain PH level and eliminate ion leaching. Choose from a polypropylene cap with a PTFE-lined foam backing or a polypropylene cap with a PTFE-lined silicone septa. Vials, caps, and septa are shrink-wrapped separately.
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