Got my Munjaro pen from the chemist but no needles

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Today I picked up my 2.5 ml M pen prescribed as part of my T2 Diabetes treatment. M was recommended by my practice Diabetes nurse, who I think left by now, and approved by an Endycronologist last week.
I think my GP omitted requesting needles alongside my pen. I only got a box with a pen and 2 booklets inside it. I know I can contact my practice to get that missing prescription but it would be much simple, I think, if I get some needles myself from a chemist tomorrow.
What am I looking for? Do I take an empty box leaving the M pen in the fridge and ask for a box needles at the chemist's counter?

Hi! I think the chemist would probably know, but I ordered these spare ones when I got my first pen from Oushk just in case I broke one or something x

You need insulin pen needles, they are standard and will fit the Mounjaro Kwikpen as well as insulin pens. They should be described as 4mm in length and 32g which describes how fine the needle is. They might do 6mm or 8mm which would be ok as well. The fineness guage can be 29g to 34g too. Any combination would do, but it seems most pharmacies provide 4mm 32g pen needles.

ukmedi.co.uk/products/32g-4mm-bd-micro-fine-ultra-pen-needles-penta-point-bd-320497-ukmedi-co-uk