- Screw vial,10 ml,CTC Hdspce/SPME,100 pk. Be the first to review this product. $68.95. SKU: . Overview. Specifications. Vial, screw top, headspace, clear, round bottom, 10 mL, 23 x 46 mm, 100/pk. Vial size: 22.75 x 46 mm (18 mm cap) Aijiren headspace vials are constructed from type 33 and type 51 COE borosilicate glass, with