It is aftermarket parts  Newest custom design:  With edge cut grips,each grip design features excellent traction for your hands.Ring leader design features a black knurled rubber grip for extreme comfort feel  Wide-range fitment:  Diameter :Both inside hole size are 1 inch ,out hole diameter is 1.5 inches ( 3.8cm).  It is aftermarket parts used for Honda,Yamaha,Suzuki and Kawasaki Harley cruiser with 1" handlebars(both left and right)  NOT fit Harley Dyna Wide Glide 2006-2008,Harley Fat Boy 2007-2011, Harley Screaming Eagle 2008-2011,Harley Davidson Heritage Softail Classic 1999, Harley Davidson Sportster 1200XLH 1994,2011 Harley street glide,Honda GL,2005 Kawasaki Vulcan 2000  Not fit the 1-1/4" handlebar(on throttle side)  Not fit 08+ Harley Davidson motorcycle models with electrical throttle  Black anodizing Finish:  Precision CNC machined,finished in flawless chrome or black anodizing,antioxidation and rustless.  Excellent look:  Collars, rings and end caps machined from billet aluminum for an excellent look  Note:  The size refers to the outside diameter of the bar end on the left side of your motorcycle.  If you don't know the O.D. of your handlebars, measure with a caliper, an open-end wrench or other device.  Each set of grips comes with two grips: one for the clutch side (small inside diameter) and one for the throttle (larger I.D.)  Installing the wrong grip on either side may result in loose-fitting grips or grips that can tear and stretch too far during installation.