This is a 40ml jar.

For surfacers, the greater the number, the more fine the paint particles are, so this will be easier to apply on pieces that have smaller gaps/panel lines. These are not pre-thinned, so you will have to thin it before using it in an airbrush.

My estimation would be, if you are priming EVERYTHING with 1 layer of primer, then you could probably get 1-3 complicated MG's out of it, 1-4 simple MG's out of it, and 4-ish HG's. But bear in mind this is an estimation. The reason why is that you can pre-thin this primer (pour jar contents into a DSPIAE paint dropper bottle, fill jar with Mr. Levelling 1 and 1/2 times) use it with the same airbrush needle/nozzle and PSI each time, and have a relatively big dropper bottle of primer ready to go. I would think that since Bandai kits are so well made, most don't usually have surfacer imperfections like car model kits, you'd be doing 1 layer of primer on your kits and then be ready for your base color in no time. Even though the bottle is tiny, it's a lacquer paint, and you can really thin these MR Color paints out. Most people agree with a almost 60 thinner 40 paint for Mr Color, or 1 jar of mr color with 1 1/2 mr color jars amount of Mr Levlling into a paint bottle. Hope this helps, again, just an amatuer estimation.