[Neweller]

If I'm ever to do an airline upgrade, I prefer to use the colored airline material like red, blue, yellow and black. Utilizing a Bendix air chart. Like Forest stated, don't forget those little inserts in the end of the hose. Been there done that and it will save you some pain in the rear head scratching.

You may also check out any semi trailer manufacturer/suppliers for product sourcing. Most will sell to you at a much more reasonable price. Otherwise look-up a near by Bendix supplier and they should have everything you need.