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Heavy Duty Hydraulic Glass Door Closer Floor Spring 7500 Series. Heavy Duty Capacity: Supports max door weight up to 150 KGS for heavy glass doors. Premium Materials: Constructed with SS304/SS316 stainless steel and aluminum alloy core. 2-Year Warranty: Comprehensive 2-year guarantee period for quality assurance. Customizable Finish: Available in Polish, Satin, Mirror, or customized plate colors. OEM/ODM Service: Supports full customization including laser logo and color boxes. Versatile Application: Suitable for office, hotel, and glass doors with 8-12mm thickness.