Aluminum Alloy Strong Spring Automatic Invisible Door Closer Door Hardware Fittings Two Adjustable Speed Concealed Door Closer

Aluminum Alloy Strong Spring Automatic Invisible Door Closer Door Hardware Fittings Two Adjustable Speed Concealed Door Closer. Dual Speed Control: Features two-way adjustable closing and latching speeds for precise door operation. High Durability: Passes 500,000 open/close tests per BS EN 1154 standard for long-lasting performance. Fire Rated Safety: Passes 90-minute fire resistance test, suitable for fire-rated doors. Premium Material: Constructed from durable aluminum alloy with electrostatic paint finish. Wide Compatibility: Fits wooden, metal, plastic-steel, and aluminum/iron doors up to 60kg. Professional OEM/ODM: Experienced in OEM and ODM services for famous brands. 5-Year Guarantee: Provides a 5-year mechanical guarantee for product reliability. Certified Quality: Holds UL Listed and CE certifications, meeting international standards.