Description: Autosampler screw thread vials feature a wide mouth design for compatibility with all thread integrity HPLC GC glass vials manufacturer Certified Vials 12 x 32mm (ND9, ND11 & ND11S) This product is certified and guaranteed to be fully compatible with all GC, HPLC and UHPLC autosamplers requiring 12 x 32 mm vial with 9mm srew thread.