This Presta Valve is 28" and perfect for replacing old or porous tubes.
Features
Presta valve 28" AV (711mm)28/47 - 622/635Puncture-proofBicycle Tube for replacement of old or porous tubesDamage up to 3mm can be sealedFits hollow rimsTube size according to ETRTO StandardSGS-TÜV Saar tested product