Do you provide all necessary hardware accessories?

Yes, we provide a complete set including rollers, bearings, brackets, hinges, springs, and tracks.

What are the main markets for your products?

Our main markets are currently domestic.

What inspection methods are used for finished products?

We perform random inspection including visual and function inspection with uniform instructions.

Color Coded Garage Door Extension Springs

Name: Color Coded Garage Door Extension Springs
Brand: Hangzhou Kuntai Hardware Co., Ltd.
SKU: 2323156115

Zhejiang, ChinaHangzhou Kuntai Hardware Co., Ltd.

US$1.00-50.00

300 Sets

Sample price:US$50.00/set.Request sample

Product profile

Customization

Available

Function

Drive

Material

Iron

Model NO.

KT-ESP-001

Usage

Industrial, Motorcycle

Load Type

Extension

Production Process

Cold Roll

Shape

Cylinder

Transport Package

Wooden Box

Specification

80-220LBS

Trademark

KUNTAI

Origin

China/Vietnam

Key features

Oil Tempered, Galvanized, Black Oxide or E-Coated: Wound from high-carbon spring wire and finished in-house, so the springs hold up in unheated, damp and coastal installations.

Open Loop, Double Loop and Clipped End Options: All three standard end styles are produced to order and matched to your pulleys, S-hooks and bracket hardware, so the spring seats correctly without fie

Colour-Coded for Lift Capacity: Each spring is marked at the end to identify wire gauge and door weight at a glance, which cuts mis-orders and return claims on replacement business.

Company profile

Importers and ExportersHigh Repeat Buyers ChoiceSelf-brandedPatents Awarded

Hangzhou Kuntai Hardware Co., Ltd.

Zhejiang, China

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedR&D Capacity: ODM Service Available CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc. CertifiedExport Year: 4 years CertifiedNearest Port: Shanghai Port, Ningbo PortAverage Response Time: ≤6.47h

AI-Powered supplier vetting

SummaryThe supplier sells bearings, building metal fittings, hardware, doors and windows, and special steel materials. It reports broad customization and R&D capabilities, including new products in the past year and ODM services. Production is supported by punching, injection molding, hydraulic riveting, and bearing assembly equipment, with peak-season lead times of one month and off-season lead times within 15 workdays. Quality assurance and ISO9001:2015 certification are reported. However, the supplier has no valid manufacturing-capacity contract with affiliated subcontractors, lacks overseas warehouses, branches, agents, and showrooms, and has weaknesses in documented supplier assessment, corrective-action, complaint, fire-drill, and environmental-management records. No evidence of major-brand OEM customers or customer cases is provided.

CertificationsThe supplier reports holding an ISO9001:2015 certificate, providing explicit evidence of a quality-management certification. However, it reports no factory environmental impact assessment and no regular fire drills during the past year, so certification evidence is limited to quality management.

R&D capabilityThe supplier reports new products during the past year, ODM services, and multiple levels of customization. It does not provide an available SDK and does not serve well-known brands through OEM, but those points do not negate the stated product-development and ODM capabilities.

Production capacityProduction-related equipment includes punching, injection molding, hydraulic riveting, and bearing assembly machines. The supplier reports in-stock capacity, peak-season lead time of one month, off-season lead time within 15 workdays, and uniformly followed finished-product inspection instructions. A limitation is the absence of a valid manufacturing-capacity contract with affiliated subcontractors.

Customization capabilityThe supplier explicitly offers customization from samples, designs, minor customization, full customization, and flexible customization. These capabilities are reported consistently across the R&D and design-service information, indicating broad customization coverage.