Wagner QuickClick® by Peha® 20x Oval base, for screw - on round tubes, steel tube - Ø 25 mm, black or silver, color: black.
Fantastic thing! Finally I have my reasonable cantilever chairs felt pads, which indeed in round tube is not as easy / was ... After moving (before stone floor) were my existing plastic glides too hard for my floor. Affixed glides dissolved again: ju