I have here a set of fountain pens in multiple colors on the outside and all containers are empty. They can be replaced. Not sure if they can be refilled. I know really not much about fountain pins. So when it ask for the nib size, I don’t even know how to know. Since they are collectors items, I’m sure the person that will be bidding on These will know what they’re bidding on. The yellow one in the pictures, If you look closely has a little small nick out of the shell of the pen itself. Please look closely at the pictures for they are a big part of the description. Ask questions, if needed and if needed, ask for more pictures. I tried to dictate the best I could on what I know. You will be getting the leather case they come in which is in good shape and smells like leather. They do have the iridium tips. As far as I know, that’s what it is it says. You will be getting all five with the case and if you’ll take note of the pictures, the green one the gold is pretty much rubbed off the writing apparatus. All pens are sold as is. Thank you for looking and happy bidding.