Those nozzles flow fractionally less than standard. 
Standard nozzles (DSLA142P795): .........5 x 0.185mm
DSLA144P1295 (Fiat/alfa 1.9 nozzles): ...6 x 0.150mm
Best bet is generally considered to be getting a set extrude-honed, but it costs...

Standard nozzles (DSLA142P795): .........5 x 0.185mm
DSLA144P1295 (Fiat/alfa 1.9 nozzles): ...6 x 0.150mm
Best bet is generally considered to be getting a set extrude-honed, but it costs...