
Chi Galvanized Steel Insulated Garage Door for Long Term Supply. High Insulation Performance: 40mm/50mm thickness with R-value of 9-18 for stable thermal insulation. Durable Galvanized Steel: Double-layer galvanized steel sheets (0.326-0.45mm) with PU foam core. Long Lifespan Springs: 60Si2MnA torsion springs with 50k/80k/100k cycle lifespan options. North American Standard: Designed for US/CA/MX markets with compatible hinge and track spacing. Customizable Options: Supports custom sizes, surface finishes, and packaging based on standards. Quiet Operation: Features electric, beautiful, quiet, and high-quality durable design. Robust Hardware: 2.5mm hinges and double-bearing nylon rollers with 150kg load capacity. Flexible Lead Time: Off-season delivery within 15 workdays; peak season within one month.