Sep 6, 2022 · [Size] - 10ml Sample Vial size: 12 I.D.*32mm [Material] - High Quality Glass Made - made from Amber Type 1 Class B borosilicate glass, hard and durable, long-lasting, can be used repeatedly [Screw Cap Top] - All vials come with screw-on blue Polypropylene caps & PE liner attached. The cap finish : clear glass 9-425 thread