Standard Opening micro insert with mandrel interior and polymer feet for wholesales Aijiren-Aijiren Hplc Vials. 1.5mL 11mm Crimp Ring Autosampler Vial ND11-Aijiren hplc lab 300uL Micro-Insert, 31*6mm Clear, Flat Bottom, Suits for 11mm Crimp Vials: 250uL Conical Micro-Insert, 31*5.7mm, Suits for 11mm Crimp Vials: 250uL Micro-Insert with Mandrel