Originally Posted by Turbo190D

I use this in mine https://www.amazon.com/gp/product/B009PYDY5K/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1

I ordered 3.5mm and 3mm because I couldn't find for sure what size was needed. I can't remember which one I ended up using. If I still have the bag at home I'll check when I get back this evening. A 5' hose was enough for me to replace all the vacuum connector pieces in my engine bay with a bit left over for later.