This is a set of 2 TATEYAMA ALUMINIUM screen door rollers, model TO-082 (1 R, 1 L), in white.

This is a replacement roller for an old Tateyama Aluminum screen door.
As shown in the photos, there is an engraving on the roller, so please check it before purchasing.
On the second line of TO-082, there are markings such as R1, L2, or RL with numbers. What you need is TO-082 on the first line. Please be aware that there are many similar types of screen doors, but they will not fit if the engraving is different.
This set includes 5 pairs of R5 and L5.