Screen Door Replacement Wheel This is a replacement screen door wheel. We recommend replacing it if your screen door has become difficult to open and close. The old Sankyo Aluminum model number for this wheel is 3K876. Please use this as a replacement for this wheel. Since it is for both left and right sides, you will need two wheels 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 one wheel. *The price of this product has risen sharply, and the supply is very unstable. We recommend that you consider purchasing it as soon as possible.