1 - 25 Pack, Prime-Line Make-2-Fit PL 14630 Window Screen Corner Springs 2-3/4" 

Keep sliding window screens securely and quietly in place with this new 25-pack of Make-2-Fit/Prime-Line corner-mounted tension springs. 
Made from durable, heat-treated zinc-plated steel, each spring measures ¼ inch wide by 2¾ inches long and fits most ⅜-inch or 7⁄16-inch aluminum screen frames. 
The push-in design makes them ideal for building, repairing or restoring removable window screens. 
Model PL 14630; please compare the measurements with your screen frame before purchasing.

Specifications:
Length: 2¾ inches
Width: ¼ inch
Material: heat-treated, zinc-plated steel
Fits approximately ⅜-inch and 7⁄16-inch-thick screen frames
Package quantity: 25