Garden Hose Washer

Developed after bit of desperation one day when I needed a few garden hose washers and all the cars weren't at the house. This is a drop in replacement for the standard female garden hose washer. Will it work? Yes, with NinjaFlex. How long will it last? I have a few installed for about 8 months. I live in Sacramento where garden hoses, their brass fittings, and the water inside (when not running) can reach above 80C. So they've been under some torture and frankly they've already outlasted the rubber ones.