Those are OEM profile (the most common type, found on most of the modern mechanical keyboards, like Cooler Master, WASD, etc). Thin PBT caps are OEM (taller) profile, and thick PBT are Cherry profile in 99% of the cases. You will know if they are thick, as sellers will advertise that fact, and thick PBT costs more. Also look for profile descriptions: some sellers always list if their auctions are for Cherry or OEM profiles.