I threw my Zefal "double shot" floor pump in the trash due to a gasket leak. It had 2 different sized barrels each with their own plastic gaskets on the plunger. I looked for replacements but never found any. About a year later was looking on French bike parts (Zefal dealer) website "XX Cycles" and saw the gasket kit available for $3! I was bummed because, that pump, when functioning properly could take a bike tire up to full pressure in like 15-25 strokes.