1.5mL Polypropylene vial with septum cap for Dionex AS-50 and AS-AP Autosampler. The septum is slit for easy penetration The septum is a laminate of blue PTFE on the bottom and white silcone on the top Related Products: 1.5ml Vials Compare this item Storage Vial Convenience Kits, Open Top w/ Septum National Scientific