A PAIR OF REAR WHEEL BRAKE CYLINDERS FOR TRIUMPH GT6 MK 3 LAYE SELF ADJUSTING TYPE FITTED TO NON ROTOFLEX DRIVESHAFT MK 3 . ONLY AVAILABLE AS 5/8TH BORE SO MUST BE FITTED AS A PAIR . PART NUMBER GWC1121 [ GWC1501 / 1502 ETC ]