Lynn, I know nothing about Mc carbs and I plan on keeping it that way but I think these needles may be Mc. See if there is anything you can use then send me your address thru this site. https://i.postimg.cc/MHNqVN3c/needles-004.jpg https://i.postimg.cc/1Rj9kVR9/needles-005.jpg https://i.postimg.cc/B...