Low Pressure Steering Line size?

[lostbuckaroo]

I'm getting ready to replace my steering box, and do the upgraded steering linkage to complete my front end rebuild. My 05' has 214K miles on it with all the original steering lines, pump, box etc.... I'm planing on replacing all the low pressure line while I have the system drained as well as doing the O ring replacement on the pump/reservior.. as it appears the, cap, reservoir O- ring have been leaking for quite some time.

Question is what size is the low pressure line? I'm guessing 5/8"???