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50 Inch Garage Door Extension Spring for Sectional Doors ISO9001 Certified
US$9.90
20-99 Sets
US$7.90
100-299 Sets
US$6.90
300+ Sets
Sample price:US$58.00/piece.Request sample
Product profile
Customization
AvailableFunction
Buffer, DriveMaterial
SteelModel NO.
CS-SP-166Usage
Auto, Home ApplianceLoad Type
ExtensionProduction Process
Cold RollShape
CoilSpring Material
Spring Steel (High-Carbon Steel)Structure
Garage Door Extension SpringPackage
Polybag-Paper Carton-Wooden CaseCustom HS Code
73202010Wire Diameter
0.218-0.500 inMOQ
Any Small Trial Order Is WelcomeEnd Type
Looped EndsApplication 1
Residential Garage DoorApplication 2
Standard Sectional DoorOEM Service
AvailableFactory Since
2014Production Equipment
35 Sets of Spring Manufacturing EquipmentTransport Package
100X100X100cm Wooden Case, 1100kg, SeaworthySpecification
standardTrademark
chenjiOrigin
ChinaHS Code
7320209000Production Capacity
49000PC/WeekKey features
ISO 9001 certified 50 inch extension spring manufacturer since 2014 with 35 sets of production equipment
50 inch extension spring built for Residential Garage Door and Standard Sectional Door duty
0.218-0.500 in wire diameter option available on CHENJI-GAR-46
100% pre-shipment inspection with load and cycle testing on every CHENJI-GAR-46 production lot
Oil tempered finish corrosion protection for 50 inch extension spring
OEM and ODM private-label manufacturing for CHENJI-GAR-46 with custom branded packaging
35 sets of production equipment producing 50 inch extension spring to ISO 9001 standards
Small trial order welcome with free sample for 50 inch extension spring
Company profile
Business Type: Manufacturer/Factory, Trading CompanyExport Year: 2014-09-17Nearest Port: QingdaoAverage Response Time: ≤3.63hTerms of Payment: T/T, PayPal, Western UnionInternational Commercial Terms(Incoterms): FOB, CFR, CIF
AI-Powered supplier vetting
SummaryThe supplier is identified as a professional technical supplier offering 3D software design, SDK support, ODM, OEM, and multiple customization options. It reports brewing-equipment production of 1,000 sets annually, exports to a broad range of regions, and generally states lead times of within 15 working days off-season and one month during peak season, although another slice reports within 15 working days during peak season. CE certification and regular fire drills are documented. After-sales services include installation, debugging, maintenance, repair, and training. Financial records are indicated for 2021–2023, but no financial performance values are provided. Innovation evidence is weak because no new products were launched in the past year, and quality-control test equipment is reported as zero. The supplier states OEM service for popular brands, but no specific customer names or case details are provided.
Supplier typeThe supplier is explicitly identified as a professional technical supplier and provides 3D software design services. This supports classification as a technical and design-capable supplier rather than only a standard product manufacturer.
CertificationsThe supplier reports sustainable-development and product certification capability through CE certification. This is explicit certification evidence, although no additional certification types are listed.
After-Sales capabilityThe supplier has documented procedures and records for handling customer complaints and service corrective/preventive actions. It offers installation, debugging, maintenance, repair, and training, with service coverage determined by customer demand; however, it has no overseas warehouses, showrooms, agents, or branches.
Production capacityThe supplier reports annual brewing-equipment production of 1,000 sets, exports to numerous global regions, and an off-season lead time within 15 working days. It also reports one month for peak-season fulfillment in one slice, while another states within 15 working days during peak season, so peak-season capacity information is inconsistent.
Customization capabilityThe supplier explicitly offers customization from samples, customization from designs, full customization, minor customization, and flexible customization. This is direct evidence of broad customization capability.
Product Q&A
Q:What type of spring is this garage door extension spring?
A:
It is a extension spring with looped ends, made from spring steel (high-carbon steel), built for residential garage door duty.
Q:What size is this garage door extension spring?
A:
It has a 2 in inside diameter and is offered in 0.218-0.500 in wire diameter to match standard door hardware.
Q:Where is this garage door extension spring used?
A:
It suits sectional doors and standard door systems, in single springs or matched pairs.
Q:Can you make this extension spring to my door size?
A:
Yes, a 50 inch build plus custom wire diameter, overall length, hook form and finish can be made to your drawing or sample.
Q:Do you offer OEM and ODM garage door extension spring?
A:
Yes, OEM and ODM private-label production with custom branded packaging is available from our ISO 9001 certified factory.
Send Inquiry
*To:
Jinan Chenji International Trade Co., Ltd.
Jinan Chenji International Trade Co., Ltd.*Content:
Supplier replies will be sent to your registered email
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