Ningbo / Manufacturing since 1993
Dedicated to manufacturing mastery
BSI 3 Star Cylinder specialist Prolangh, founded in 1993, excels in customized production of door and window hardware.
Explore productsWelcome to Prolangh
Thirty years of hardware, measured in millimetres and trust.
Ningbo Prolangh Hardware Co., Ltd. coordinates five specialist manufacturers across architectural hardware, traffic locks, industrial lock control and pet access products.
From design and tooling to testing, finishing, assembly and global export, we help partners take a hardware requirement into repeatable production.
See how we manufactureProduct range
Hardware organised by the problem it solves.
01
Cylinder
Euro, oval, rim and high-security cylinders for residential and commercial door systems.
02Door Hardware
Door handles, knockers, letter boxes, latches, locks and adjustable hinges.
03Industrial Lock
Industrial enclosure locks, hinges, clasps and connecting-rod locking systems.
04Pet Door
Cat doors, dog doors and integrated pet access products.
05Traffic Lock
Locks for bicycles, motorcycles and other transport security applications.
06Window Hardware
Window handles, chains, locks and accessories for engineered window systems.
Selected products
Production-ready, specification-first.
Specialist group
Five factories. One accountable partner.
Manufacturing capability
Processes backed by equipment and measurable capacity.
Manufacturing
Automated Production Equipment
Manufacturing
Die Casting Machine
Manufacturing
Automatic Stamping And Bending Machine
Manufacturing
Automatic Cylinder Assembly Machine
Verification and partnerships
Evidence, standards and long-term manufacturing relationships.
Insights
What we are learning on the factory floor.
Welcome 2026: A Year of Purpose, Partnership, and Progress
Happy new year! As we enter 2026, PROLANGH extends its sincere greetings to our partners and clients worldwide. The new year is a moment of clarity and renewed direction. It invites reflection on the trust we have built and anticipation for the opportunities ahead. We value the confidence you place in PROLANGH and the long-term […]
Welcome 2025: Embracing Growth and Building Stronger Partnerships
Happy New Year! As we step into the first day of 2025, the team at PROLANGH would like to extend our warmest New Year greetings to all our valued clients and partners. The arrival of a new year signifies a time of renewal, optimism, and boundless potential. It’s an opportunity to reflect on our collective […]
The Impact Of U.S. Sanctions On Chinese Export Tariffs On China’s Hardware Manufacturing Industry And Necessary Measures
The escalating trade tensions between the United States and China have led to significant changes in the global trade landscape. One of the most impactful measures has been the imposition of sanctions and increased export tariffs by the U.S. on Chinese goods. This article explores the specific repercussions of these sanctions on China’s hardware manufacturing […]
Start with a specification
Send a drawing, a sample, or simply the problem.
Our team will route your request to the right specialist factory and reply with the next practical step.
Request a quotation