Supplier: VWR Collection. Description: Vial insert, VWR®, Glass, Clear glass, flat bottom, 0,20 ml, Ø×H: 6×31 mm. Inserts, MicroSolv | VWR. Designs offered include flat, conical, or mandrel point bottoms and may come with or Amber glass vials are available in 2-60 ml volume with a screw top. Chromatography Vial Inserts | VWR