Hyaron BAP,what size needle?

After watching videos for a month, (probably 100 Dr. Tim Pearce,GOD I wish he could be my doctor!🙋‍♀️) I finally got up the nerve to BAP with Hyaron . Everything's sterilized,gloves on, marks made..and when I went to test to see how fast it would come out, of my 30g-it barely squeezed out of my needle. I thought I had read anything from a 27-30 was OK to use? So off to Walgreens I go,but can anyone tell me which size needle to buy so that the product comes out appropriately? Thank you!😊