Vials Borosilicate Glass with Green Open Top Cap and fluoropolymer resin PTFE/Silicone Septa Amber Capacity: 40ml. Neck size(mm-GPI Thread): 24. Vials Pack - 2 Trays of 72. Vials Pack 2 Trays of 72. NOT PRE-CLEANED. Bottle with.015 fluoropolymer resin PT