Probably 300' of the 34BA Bright Yellow Breathing Hose from Amron International. Or from a competitor if I can find one as the one from Amron is out of stock until Feb 8. I am also seriously thinking to have my existing hose analyzed by a lab to see what if any derrogatories exist. I am very curious about this entire hose business and not looking for shortcut just clarity. Is it possible that the cost to get approvals from OSHA, etc....is not worth it for some industrial hose manufacturers and maybe their hose is perfectly okay. I have the money to do this research so why not. Reports of the study and findings will be made avaailbe here at $50 per (hahahah kidding). Thanks fstbttms for lighting a fire under my you know what.