Vial 20ml, Amber glass, Round Bottom, 22.5 x 75.5mm Septa : 17.5 x 1.5 mm PTFE/silicone, Temperature resistance - 60 °C to 200 °C Screw Caps : Magnetic precision screw-thread metal cap Products Features: The precision screw-thread vial always be applied to Shimadzu, Spectra-Physics, Varian, and other autosampler. The clear one is made of USP