What is your color available?

White, Black, Gray,Golden, Brown or customized.

What's your regular packaging?

with carton and EPE first and then put all windows on the wooden pallets and fix with EPE to keep it not moving in the container.

How can I get a price of door/window?

Please give the exactly size and quantity of your required door. We can give you a detail quotation based on your requirements.

How to install your product, is it difficult?

Installation video can be provide. And you can contact our salesman if you have any question. Of course we can offer on-site installation guide services if you need.

Can you do the full set products according to my project drawing?

Yes, our engineers will check your engineering drawings to ensure the accuracy of each different accessory and quantity.

Could you send me the price list?

Yes, the product is not standard, the size is customized according to your requirements, I can provide a regular size quotation for reference.

4-Inch Invisible Door Spring Automatic Closing Hinge Multifunctional Closer Hinge

Name: 4-Inch Invisible Door Spring Automatic Closing Hinge Multifunctional Closer Hinge
Brand: Charmo Window Innovations Manufacturing Co., Ltd.
SKU: 1971750781

Chongqing, ChinaCharmo Window Innovations Manufacturing Co., Ltd.

US$2.00-2.20

1,000 Pieces

Sample price:US$4.00/piece.Request sample

Product profile

Customization

Available

After-sales Service

2-5year

Warranty

2-5year

Material

Stainless Steel

Type

Composite Plastic Door

Installation Type

Doorframe

Function

Close The Door

Standard

Remote Control

Without Remote Control

Door Width

950mm

Door Weight

25~45Kg

Usage

Market, Fire Exits, Home, Hotel, Office, Hospital, School

Color

by Customer

Size

by Order

Brand

Charmo/OEM

Thickness

2mm

Maeterial

Cold-Rolled Steel

Surface Treating

Painting

Transport Package

Standard

Specification

customized

Trademark

Charmo

Origin

China

HS Code

8302420000

Production Capacity

100000000 Piece/ Year

Key features

Heavy-Duty Build: 2mm thick stainless or cold-rolled steel supports doors weighing 25-45kg.

Customizable Design: Tailor color, size, and style to match any architectural need.

Wide Application: Ideal for homes, hotels, offices, and fire exits with versatile installation.

OEM & ODM Service: Designated OEM for YKK with flexible customization options available.

ISO Certified Quality: Certified in Environment, Safety, and Quality Management systems.

19 Years Experience: Manufacturer established in 2006 with extensive industry expertise.

Fast Delivery: Peak season lead time one month; off-season within 15 workdays.

100% Inspection: All finished products undergo visual inspection with strict QA/QC.

Company profile

Quality AssuranceManagement CertificationPatents AwardedR&D Capabilities

Charmo Window Innovations Manufacturing Co., Ltd.

Chongqing, China

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedR&D Capacity: ODM Service Available & OEM Service Available CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc. CertifiedExport Year: Confidential CertifiedNearest Port: Chongqing PortAverage Response Time: ≤3.73h

AI-Powered supplier vetting

SummaryThe supplier is identified as a professional technical supplier offering doors and windows, including plastic-steel and aluminum-alloy products. It provides 3D software design and broad customization services. Quality and sustainability management are supported by ISO9001:2015, ISO14001, and ISO45001:2018 certifications, documented inspection, corrective-action, complaint-handling, and traceability procedures. The supplier reports inventory capability, defined seasonal lead times, and multiple quotation and payment options. However, it has no available SDK, no valid manufacturing-capacity contract with related subcontractors, no overseas warehouse, showroom, agent, or branch, and no offline trade-show participation. Export sales account for 31%–40%, but overseas service coverage is recorded as zero. Financial records are referenced for 2022–2024, but the provided slices do not establish financial strength.

Supplier typeThe supplier explicitly identifies itself as a professional technical supplier, offers doors and windows, and describes an independent window-brand system launched in 2021. Its stated product scope includes plastic-steel and aluminum-alloy products.

CertificationsThe supplier reports ISO9001:2015, ISO14001, and ISO45001:2018 certifications. It also states that quality assurance, raw-material traceability, and documented inspection procedures are in place.

R&D capabilityThe supplier provides 3D software design services, identifies as a professional technical supplier, and promotes a technology-oriented window brand. The lack of an available SDK is a stated limitation, but it does not negate the evidenced design capability.

Customization capabilityThe supplier explicitly supports customization from samples, designs, full customization, minor customization, and flexible customization, together with 3D software design services. This indicates broad customization coverage.