I bought an Osmo and some accessories on eBay, it came with a variable ND filter, but not the standard "filter", as the ND filter was already on it when I got it.

Is it possible to purchase the stock filter?

Edit: Is this what  I need? https://www.amazon.com/GREEN-L-W ... eywords=osmo+filter

Hi, that would probably do the job for you.

I also need a replacement for my O+ and wasn't able to find an OEM anywhere.  The one you IDed is one I ordered.  Haven't received yet so don't know if it's any good.  

Follow up with us if it's up to par as a replacement. I may get one just to have spares around.

Are there any suggestions on a specific brand or set of filters to get for the Osmo+? Or is it not even beneficial? I've been asking around and no info yet if it would be pivotal to get one, or a certain set, or not.

This UV filter does not fit the Osmo+  https://www.amazon.com/gp/produc ... 1_s00?ie=UTF8&psc=1

Damn, it's unavailable now. Anyone else got a lead on something else comparable?

This variable ND fits the Osmo+.  https://www.amazon.com/gp/produc ... 1?ie=UTF8&psc=1  Gimbal balance seems perfectly fine with it on. I haven't been able to field test yet but seems good build quality.  No click stops for the various levels of ND, it freely rotates, so it'd be very easy to knock it off whatever setting you've dialed.  For $10 it's not terrible.  Optical quality will tell once I have the chance to test shoot it.