The 78 cassette box spring is a core torsion component for 78 mm roller‑tube full‑cassette retractable awnings. It provides rebound force for the fabric roller to ensure smooth extension and retraction of the awning.

✅ Manufactured from premium spring steel with quenching treatment for consistent, long‑lasting torsion. Resists force decay and fracture after repeated operations. ✅ Stable rebound performance keeps fabric neatly rolled without jamming or sagging. ✅ Anti‑rust surface treatment for good corrosion resistance in outdoor conditions and long service life. ✅ Precision dimension to match standard 78 full‑cassette roller‑tube assemblies. Suitable for new production and replacement repair. ✅ Simple installation for quick swap‑out of old springs. Compatible with full‑cassette retractable arm awnings.

Application: 78mm full‑cassette retractable awnings, outdoor retractable arm awnings, OEM assembly and after‑sales replacement parts.