THIS IS A VINTAGE SCHWINN BICYCLE FRONT BRAKE CALIPER. IT IS USED ON MANY SCHWINN STINGRAY BIKES STAMPED SCHWINN. IT CAN FITS MANY SCHWINN ROAD BIKES, FASTBACK BIKES AND SOME OTHERS. IT WILL FIT MANY OTHER BRANDS OF BIKES AS WELL BUT IT IS BEST FOR SCHWINN. STAMPED SCHWINN APPROVED / LS-2.8.