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.
01
Production Equipment
02
Surface Treatment
03
Assembly Line
Verification and partnerships
Evidence, standards and long-term manufacturing relationships.
Intellectual property certificate
HSPM compliance report
DCI certificate
BSI Kitemark certificate
Insights
What we are learning on the factory floor.
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