SR20 Turbo Oil Return Hose Diameter question

[s86d]

So I am converting my SR20 back to a bottom mount setup. I purchased the car with it's current top mount bits and don't have the the bottom mount OEM parts. This means I am also switching the -10 AN fittings back to a stock style setup. My question is what diameter is the rubber oil return line so I can get the correct fitting that threads into the block and have a running car again??

I searched but no luck.

Thanks!

[bansheeracer2003]

I use a 5/8 oil hose
you can also buy the original one online

[s86d]

Awesome thanks. I bought the OEM hose (enroute) I needed the diameter to get the threaded fitting that goes into the block (it's currently a -10an fitting)