These seem well made. I was pleased with the valve length of 50 mm which allows me to use medium-profile (semi-aero) wheels of 35mm rim depth. Just the right amount of valve protruding from my wheel. And also the right spec for 700x25 tyres as these are labelled suitable for 700x18-28. Still got good pressure two days after pumping them up. Delivery was a bit slow due to Royal Mail needing a signature, not the fault of Vanilla.