Piecing together an A/C system

Those will work and appear to be standard O-ring type. Their clamps are Oeticker stepless ear-clamps (or copy), in a twin arrangement. When I use Oeticker clamps, I also use two and stagger the ears 180 deg. I've used them when I don't have a ferrule die for that size or working on-car where I can't get the crimper on the hose. I use nail-puller pliers w/ long handles, rather than their special crimp tool. Might also find PEX clamps which fit (Home Depot) and use their pliers tool. Any barrier-style AC hose will work. I prefer reduced-barrier size when it fits my existing Master-cool ferrule crimper dies. I bought hose and O-ring fittings on ebay. Still have rolls of #6 reduced, 8, 10, & 12 reduced after installing AC in my 3 old Mopars and re-hosing my two 1980's M-B (re-used those special fittings).