Wholesales screw neck vial caps for aijiren Technology hplc-aijiren Vials Wholesales screw neck vial caps for aijiren Technology hplc Material: USP Type 1, Class A, 33 Borosilicate Glass Volume: 2ml (standard volume) 1.5ml(actual volume) Application: HPLC and GC system Dimensions: 11.6 x 32mm Neck