Autosampler Vials, Closures and Inserts for HPLC and GC for Aijiren. Features: Green Snap Cap with red PTFE/white Silicone, High purity septum 100. HPLC COLUMNS GC - VERTICAL CHROMATOGRAPHY CO.,LTD. 12x32mm Vials 9mm Screw. 12x32mm Screw Thread 9mm Mouth Vials. Description Septa for Aijiren 9mm Open Top Cap, PTFE/White Silicone, 0.040" thick