lab chromatography 5x31mm clear glass flat base insert for vials. $2.80 - $3.50 / Pack. 100.0 Packs (Min. Order) Aijiren glass insert vial 0.3ML for 2ml 9-425 automatic hplc vial for lab use. $3.20 - $4.00 / Pack. 10.0 Packs (Min. Order) 6mm micro insert with glass flat base for 9-425 autosampler vial. $0.056 - $0.081 / Piece.