Screen Door Replacement Rollers These are replacement screen door rollers. We recommend replacing them if your screen door has become difficult to open and close. The old Sankyo Aluminum model number for these rollers is 3K876. Please use these as replacements. They are for both left and right sides, so you need two rollers per screen door. Product Specifications 3K screen doors, Noista screen doors, external sash screen doors, etc. For both left and right sides. Please secure with screws. Note: This is the price for 4 rollers. *Product prices have risen, and supply is very unstable. We recommend that you consider purchasing them as soon as possible. ⭐️☆⭐️☆⭐️☆⭐️☆⭐️☆⭐️☆⭐️☆⭐️☆⭐️☆⭐️☆⭐️☆⭐️☆⭐️☆⭐️☆ ●For construction companies: Customers considering large-lot purchases, please contact us via the comment section.