Milgard screen rollers part number

Thanks for reaching out to us. Have a look at our 84-016 , 84-091 , and 84-101 rollers. Review their dimensions and see how they compare with your old roller. 

I know your old roller has an open circle that our parts lack but it's another old design that the manufacturers that make these rollers no longer use. The newly enclosed circle design snaps onto the door corner, rather than hooking onto it as your original roller does. The new style can be a bit trickier to install but is less likely to accidentally detach from the corner.