£one.35 GBP Nitto Denko Vent silicon adhesive patch Int/Ext 200kPa 12x8mm oleophobic gray Wonderful vent for many alternative apps. May be used on the inside or outside of a sealed machine. Will allow stress to flee out of your sealed uni...Donaldson offers expertise in ePTFE-strengthened composite PEM for gasoline cell stacks ??an enhanced substi