As others have said, the E2 takes Proline B blades without the need of an injector.
Also, you can reuse an old injector and insert new blades in it, which is what I do with my other type of Schick razors (I2, J1).
Also, you can reuse an old injector and insert new blades in it, which is what I do with my other type of Schick razors (I2, J1).