No, ok, with the pens you get to choose the type and kind of needle you put on it. Some folks choose the little, itty bitty one… on me they bend big time. (The gague of the needle isn’t thick enough). For young kids, or thin skinned folks <wg

You take the cartridge and screw the needle of choice onto the tip. Dial up a unit to test the connection/flow is good… and if the droplets of insulin come out when you depress the button… you dial up whatever you use/need.
Inject and all is right in the world…

Many leave the same syringe on, some take them off between injections… and others change the needle and start anew with every injection. However if you leave em on, you merely need to remove the air bubble which will occur in the vial from time to time…. oh and make very certain that the two protective sheeths don’t come off the blessed needle. (Can’t tell you what a annoyance it is to have to change out the needle because the two sheaths came off and the needle is now bent like a pretzel…. when you just want to inject it and have lunch

Missing anything anyone???
jeff