Aijiren 250ul micro volume glass insert for 2ml clear vials Insert for 2 mL standard opening vial, 4.6 mm I.D. volume 0.15 mL, conical clear glass (with bottom spring), O.D. × H 5 mm × 30 mm, pkg of 100 ea; find Supelco-24707 MSDS, related peer-reviewed papers, technical documents, similar products & more at Sigma