AEA AEA SF Standard leak .25

Just wanted to post an update, BINTAC has some top tier customer service. Set me up a video call with a technician, diagnosed it immediately and told me the specs of the part. Turns out it's a tiny one way valve, the Oring on the inside had been worn down. They sent out a replacement o ring, but im impatient and ordered one next day. The exact size is 2.6mm*1.2mm

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Hi ! I own a AEA! Was wondering where did you order your o rings from? Ebay the only place I was able to find that exact size and there coming out of China, 3-4 weeks on shipping! Help !
 
Hi ! I own a AEA! Was wondering where did you order your o rings from? Ebay the only place I was able to find that exact size and there coming out of China, 3-4 weeks on shipping! Help !
I just bought from local hardware Shop. Outside dianeter is little bit bigger than original, backseat it's little bit too thick.
It works nicely, but adds little bit resistance.