Aijiren Technology volatile organic analysis vials PTFE silicone septa with cap 10mm chromatography vial septa with caps Aijiren Technology-Aijiren HPLC Part No. Products Name/Size pcs/pk 10-425 screw neck vial SV1012C 2ml Clear vial, 10-425 screw top, graduated with writing area 100 SV1012A 2ml Amber vial, 10-425 screw top, graduated with writing area 100 Caps+Septa preassembled SV1001CS White PTFE