✔ Material: High-carbon steel (SAE 1065/1070) – heat-treated for longevity
✔ Gauge Options:
11-Gauge (2.9mm) – Extra firm (heavy-duty sofas)
12-Gauge (2.6mm) – Standard firmness
13-Gauge (2.3mm) – Balanced support (most common)
14-Gauge (2.0mm) – Softer feel (lightweight chairs)
✔ Finish: Electro-galvanized or powder-coated (anti-rust)
✔ Spring Type:
Continuous wave/zigzag "S" shape
Open-loop or closed-loop ends (for clip or weld attachment)
Pre-attached clips (optional for easy installation)