Window Screen Spline, Multi-Spline, 3 Sizes in One, Black. 20ft. per roll.

This is a fantastic product for homeowners because it includes the larger size, like you need for many screen doors and the smaller sizes for others, like my Larson storm doors with screens and then a middle size for my house window screens. It takes the guess work out of buying the correct spline, plus you'll eventually need the other sizes too and will be prepared.

I'm so glad I bought this with 3 gauge options because the metal grooves in the lanai where those are supposed to go must have warped because the top required a medium, while the side of the screen required the large.