They are made from Rubber for quality printing and long life. They are not all listed. You need to up date or change with them. 60050 Thanks for looking Todd.The item "Kelsey Excelsior 3x5 Rollers and trucks rubber, to fit your letterpress press" is in sale since Tuesday, October 13, 2020. This item is in the category "Business & Industrial\Printing & Graphic Arts\Printing & Graphic Essentials\Type, Cuts & Printing Blocks". The seller is "toddspresstime" and is located in McHenry, Illinois. This item can be shipped worldwide.