Yes Lu, that's a classic/penstyle size. I think I recall you saying you have a classic with manual switch from David Yang, if so, do the holes look like the Janty?
I've just had a look at an old RN4072 atomiser I have and can only find one slit-like hole at the rim.
No...they look like the ones I got from puresmoker. When I first saw all the vapor I got, I thought "Wow....this manual switch is great!" But when I tried that atomizer on my regular pen batt, I still had great vapor. That's when I checked the atomizer and saw the 4 holes. I then ordered some from PS and they were the same thing.
Lu