plastic screen spline
A contractor from easthampton ma. 01027 says:
April 10, 2016
replacement screen spline to rescreen pella screens
Paul from SWISCO responded:
April 11, 2016
Pella has been known to use our 59-270 .270 foam screen spline. Could this be what you have now? You may want to confirm your current spline's size to be sure.