@audioquest4life ;
All of our tubes are 100% guaranteed to arrive as described, test as described and to be void of any sound defects including microphonics and noise. We offer a 30 day return window from the day you receive the item for all vintage tubes and 90 days for new production tubes. PLEASE NOTE - While we accept returns for basically any fault, we DO NOT accept returns for buyer's remorse which includes buyers who decide they don't like the subjective tonal signature of a tube.
All Psvane branded tubes receive a special 1 year guarantee
Any returned tube must test within 10% of the original value. Any larger variation would indicate many hours of use or abuse and voids our warranty. Email us before you return your item. We will email you a pre-paid return shipping label and will issue your refund / replace the item once it arrives back.