Genuine Fender pickup cover set, for traditional Strat pickups. These covers will fit almost all Strat replacement pickups from most manufacturers, so long as they're constructed in the conventional style, such as:
Fender '57/'62
Fender Custom Shop Custom '54
Fender Custom Shop Custom '69
Fender Custom Shop Fat '50s
Fender Custom Shop Fat '60s
Fender Deluxe Drive
Fender Eric Johnson
Fender Tex-Mex
Fender Pure Vintage '59
Fender Pure Vintage '65
Fender Texas Special
Fender V-Mod
There are many aftermarket pickups available from Fralin, Lollar, Suhr, Van Zandt, Bare Knuckle Pickups, Grosh, and many others that these covers will also fit. Essentially, if the pickups you have are constructed in the conventional way (top and bottom flatwork held together by the magnets), these covers will likely fit.
They will not fit pickups that deviate from conventional construction, such as stacked humbuckers (Fender Noiseless, Duncan Classic Stack, DiMarzio Area), side-by-side humbuckers (Duncan Hot Rails, Lace Holy Grail), etc.