Homebuilt ROVs Forum

I have a brushless motor that had a 3 mm shaft on it. I need to waterproof it but I can not find a 3mm seal anywhere! Does anyone know where I can get one from? I really need it.

Thanks-
Erik

I know the O-ring store has 1/8" u-cup seals which is 3.17mm for 50 cents each.
Straight 3mm seals though...haven't seen any.