网页4ml vials silicone/PTFE bonded septa screw neck-LC MS Vials China 4mL 13-425 Screw Neck Vial ND13 Manufacturers 1.4ml Screw Neck hplc Vials ND13 2.13-425 PP Screw caps, PTFE/silicone septa 3.Made of Clear or Amber borosilicate glass Features 1) For storage purposes also available with closed top screw seals.