11 mm6,3 mmsteelProduct descriptionBarrel nipple to fit the pear-shaped nipple of the cable to the brake- and clutch levers. Brake- and clutch cables on your traditional scooter usually come with pear shaped nipples. These require barrel shaped adapters to fit the levers. While there are cables with a barrel shaped nipple these tend to twist when threading them into their housings. This then causes the braiding of the cable to unravel, with friction in the housing going up dramatically. Hence the two piece construction is pretty much the gold standard, and rightly so. Our recommendation – TIP: The end-nipples are only as good as the cables they are being used with. We recommend the Performance cable sets as durable quality solution.OEM numbers (for comparisons):178709 (PIAGGIO)