Sign up for InnoLet® today and you'll receive a certificate for 5 InnoLet® dosers each prefilled with 300 units of Novolin® insulin human insulin (rDNA origin), available in any one of the following formulations: 70/30, N, or R. That's up to a one month* supply! InnoLet® dosers use NovoFine® disposable needles, which are designed to help increase injection comfort. NovoFine disposable needles will need to be purchased separately and may require a prescription in some states.