EXCELLENT - Model HM-0550 - High quality manufacturing 2ml 11mm snap top HPLC Vial's Cap and Septa. 11mm septa • White PTFE / red Silicone septa temperature resistant -60℃-200℃ 2ml clear snap top vial • It can be opened directly with hand press to ensure the sealing , convenience and high efficiency; •Also the crimp cap can be used