This set of shocks have 350mm pin to pin mounting. The top pin is 14mm and the bottom is 10mm. Kawasaki Z / KZ 900 A4-A5 (1976-1977). Kawasaki Z1 (900cc) (1973-1975). Black Rear Shock Absorbers. These shocks don't have the lense / reflector on the shroud like originals.