This is a new old stock set of  PFC 1.25" (32mm) x 12.3" (313mm)  12 bolt, 48 vane racing rotors. Part #313.32.0042.47/8 for use w/ PFC pad shape 77735, 7751 ect. Rotors are mounted on PFC 5 x 5" billet aluminum new design V2 hats part# 203.778.503.13 and V2 mounting hardware.