Mast Pro Cartridge Tattoo Needles Disposable 20Pcs of One Box Standard Size Round Liner 1203RL

Q: Does it have protected membrane?

Yes,there is protected membrane to prevent ink flow .

Q: I need 1005rl…when I choose that option, the picture shows a 5rm…how can i make sure i get 5rl?

https://www.amazon.com/dp/B08F7NQLL2?ref=myi_title_dp This is 1005RL .

Q: Which needle is 0.30mm 1201 or 1211?

They are both 35 mm 1201 is a one needle liner and 1211 is a eleven needle liner or shader, the mast needle cartridge fit all pen tattoo machines if that’s your worry, now there are machines that are just for makeup and are very small almost as small as a marker, they might not fit those, but all others should be fine, I hope I didn’t confuse you