... is red, blue, white ,natural . septa ptfe/silicone septum 12mm dia 1.5mm thickness for HPLC 4ML vialsdiameter:12mmprompt deliverylowest price,high ... /ODM is acceptable 1.use for hplc,autosampler,chromatography,Agilent,waters machine2.glass vials with 8mm PTFE/silicone septa liner3.avaible volume ...