Hi there, i have just recently bought a new shaft from a well known internet auction site and am wary as to whether the sure fit sleeve is genuine or an aftermarket one. The one on my shaft bought from my golf pro has a serial number where as the one bought used from the auction site does not. Does this mean it is a fake or do some genuine ones have no serial number. Shaft looks fine, has serial number and hologram sticker. Sleeve looks good but no serial number. Have i bought a dud, thanks.