4 Pack Sliding Screen Door Tension Spring Kit For M-Shaped Rollers With 1 Inch Ball Bearing Roller, Replaces B512 B513 And B746, Fits Top And Bottom Tracks, Works With Columbia And Uni-Fit Doors, Built To Last Steel Replacement

4-Pack Screen Door Tension Springs with 1in Ball Bearings
✔️ M-shaped 2-5/16in spring with 1in roller for top & bottom tracks

This four-pack is a direct replacement tension spring kit for sliding screen doors using M-shaped rollers. It’s designed to work with Columbia and Uni-Fit door systems and is compatible with a variety of other brands that use similar top and bottom track rollers.

✅ 4-pack includes top and bottom rollers for sliding screen doors
✅ 2-5/16in M-shaped tension springs and 1in steel ball bearing rollers
✅ Snaps onto existing diecast door frame for quick, tool-free installs
✅ Replaces B512, B513 and B746; steel construction for durable use

💡 What is a sliding screen door tension spring kit used for? This handy kit helps restore smooth operation and extend door life.

- handy replacement for worn rollers and springs on common screen doors - supports top and bottom track operation for consistent sliding - easy snap-on installation reduces maintenance time - compatible with multiple brands like Columbia and Uni-Fit