What lines to vent covers to vent tank

What hose should I use for venting my valve covers to the breather tank. Hoses will run length of vehicle as the vent tank is located in the rear. Fitting off off the valve covers are 1 1/4 od and the hose need to be flexible to work it way through the car

thanks

On my scavenger setup I am using -10/12 AN pushlock line.

As big as you can fit to keep the air speed down. If possible, the line should be all downhill so the droplets don't drein back.
That would be $1,000 for bullet proof, braided tungsten carbon fiber, or $12 for PCV and hose clamps.