Description: VWR Insert, Standard Conical Glass, Pulled Point Bottom, for Wide Mouth Vials, 6x31 mm, Clear, Capacity: 400ul VWR® 8-425 Screw-Thread Vials, Kits, Caps, and Inserts, Standard Opening Supplier: VWR International Description: 8-425 autosampler screw thread vials feature a standard opening design compatible with 5 mm inserts.