Thanks. If you are going to store photographs, cards or any printed material, you will need to first put them in some kind of hard case and place acid free paper between each one. Good Luck. rockhound
They are from the company curtec! May you found a dealer in the US. They are made in Germany and are real best quality!!
I have put in there acetone, acid and all kind of stuff which did n´t harm them in any way. They are made out of HDPE and the containers and also the rubber seal inside the lid are nearly indestructible.