Profile Racing signet guard sprocket

SIGNET UNIVERSAL GUARD SPROCKET -CNC machined from 6061 aluminum -Made in the USA by Profile Racing -The Signet Guard is a unique “universal” sprocket. -It uses an adapter insert to  make the sprocket compatible with spline drive or bolt on style cranks. -The adapter is available for 19mm, 22mm, & 24mm axle sizes. One sprocket fits all! -A Universal Adapter Insert can be added when purchasing the guard sprocket(Recommended), purchased seperately, or be not required if you already have one. HERE Following are the Universal Adapter choices: A. 19mm Spline Drive B. 22mm Spline Drive C. 19mm Bolt On D. 22mm Bolt On E. 24mm Bolt On Sizes: 25t, 27t, 28t – 1/8 ” chain width Colors: Black or Silver anodized with laser etched graphics. Weight(without insert): 125g/4.37 oz (25t)