Manufactured with Yellow polypropylene 9-425 9mm type threaded vial caps ; Pre-slit liner , more easy to pierce , protect injection needle ; With Blue PTFE Faced White silicone ,pre-slit Liner ; Yellow screw cap with hole + PTFE / Silicone septa also compatible with most Autosampler vials ; Suitable for 1.5 mL, 1.8 mL, 2 mL 9-425 vials