I picked these up to keep as a backup for my electric mini pump, and while I haven’t needed to use one yet (and hopefully won‘t anytime soon), they fit my inflator perfectly as expected. This size is perfect for my 700cx28 road bike tires with just a bit of extra CO2 when inflated to 80psi, and I‘m confident they ll work without any issues when the time comes. They arrived neatly packaged, clearly labeled, and overall feel like a solid value for the price. A simple, dependable accessory that does exactly what it should.