Thanks. I'll look into other ones. Know it's everyone has own favorite type. I assume all U100 syringes measure the same unit wise, it's just needle length and gauge that's different ? My neighbor has Walgreens 29 gauge, 0.3mL, 1/2 inch needle syringes she said I could try. Have half unit markings. Those would work wouldn't they. He's on 1.5U 9f levemir