Donghai Kaikai Quartz Products Co., Ltd. is a specialized manufacturer and trading company established in 2003, located in Donghai County, Lianyungang—widely recognized as the quartz center of China. The company operates a factory facility between 1,000 and 3,000 square meters with four production lines and an ISO 9001 certified quality management system. With a workforce of 51 to 100 employees and a dedicated R&D team, the firm integrates design, development, and advanced further processing to deliver high-purity quartz solutions.
The company's extensive product portfolio includes fused quartz tubes (ranging from OD2-900mm), UV-stop and twin quartz tubes, quartz plates, rods, and optical windows. They also manufacture specialized laboratory and industrial components such as quartz tanks, boats, crucibles, flanges, joints, and distillation equipment. Beyond industrial applications, the company offers crystal singing bowls and tuning forks.
Donghai Kaikai Quartz Products Co., Ltd. provides comprehensive OEM, ODM, and design services, leveraging an investment of over 5 million Yuan in their processing workshops to support custom manufacturing based on client drawings or specific dimensions. Their annual revenue is estimated between US$2.5 million and US$5 million, serving international markets with professional quartz processing and supply chain capabilities.
OEM manufacturerOffers OEM services for customized brand manufacturing.
ODM manufacturerProvides ODM design and manufacturing solutions.
Product customizationOffers full customization for design and features.
Established brandFounded in 2003, with over 20 years of industry experience.
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Products
Products
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MOQ Range
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Milky Quartz Flange and Ring (KK04)
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Fused Clear Quartz Tube (KK01)
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Clear Quartz Tank/Container (KK009)
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Frosted Glass Bottle Process (KK05)
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Milky Quartz Insulating Flange
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Fused Clear Spiral Quartz Tube
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Milky Quartz Flange and Ring
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Polished Clear Quartz Plated
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Customers
WEBSOL
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Certifications
ISO 9001
1
International Organization for Standardization 9001
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Key export market
🇮🇳 India🇮🇳 India
🇻🇳 Vietnam🇻🇳 Vietnam
North AmericaNorth America
South AmericaSouth America
OceaniaOceania
AfricaAfrica
🇪🇪 Estonia🇪🇪 Estonia
AsiaAsia
🇲🇪 Montenegro🇲🇪 Montenegro
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Donghai 99 Quartz Technology Co., Ltd., also known as Lianyungang Jiujiu Quartz Technology Co., Ltd., is a professional manufacturer and exporter specializing in high-purity quartz and fused silica products. Established in the early 2000s and headquartered in Donghai County, Lianyungang—a region renowned for its abundant silicon resources—the company operates a factory spanning up to 5,000 square meters. With ISO 9001 certification and multiple production lines, the firm maintains rigorous in-house quality control and statistical process control to serve the lighting, heating, chemical, and electronics industries.
The company's extensive product portfolio includes clear, UV-stop, ozone-free, and milky quartz tubes, as well as quartz plates, rods, discs, and fused silica apparatus. They are recognized for technical capabilities in producing ultrathin quartz glass (down to 0.05mm) and large-diameter tubes. Beyond raw material production, the company provides comprehensive secondary processing services such as trim cutting, fire polishing, bending, pinching, and custom ODM/OEM manufacturing. Their expertise extends to specialized lighting components, including metal halide lamps, high-pressure mercury lamps, and infrared heat lamps.
With a dedicated R&D team and a workforce of up to 50 employees, Donghai 99 Quartz Technology Co., Ltd. exports approximately 60% of its output to international markets across North America, Europe, and Asia, including Germany, the Netherlands, Japan, Korea, and the USA. The company is committed to delivering high-grade quartz solutions backed by advanced production facilities and rich technical manpower.
Clear Quartz Tube (NO. 1)
Pulse-Start Uniform Metal Halide Lamp (NO. 3)
Reflector Type High Pressure Mercury lamp (NO. 4)
Blended-Light High Pressure Mercury Lamp (Clear)
Metal Halide Lamp For Plant Growth (American Standard)
High Pressure Mercury Lamp (Coated)
Metal Halide Lamp (T, Clear)
Super High Pressure Sodium Lamp (European Standard)
Single Ended Ceramic Metal Halide Lamp (NO. 8)
Donghai County Ruihai Trading Co., Ltd.
🇨🇳 China
201511-50 peopleManufacturer/Trading Company
OEM manufacturer
Product customization
Low MOQ
Key market
🇹🇼 Taiwan
Description
Donghai County Ruihai Trading Co., Ltd., established in 2015 and located in Lianyungang, China, is a manufacturer and trading company specializing in high-tech materials. With 11 to 50 employees, the company is ISO 9001 certified and operates a factory in Donghai County, known as the "Chinese quartz Center." They are a contract manufacturer primarily focused on quartz glass products for the quartz, semiconductor, fiber, and solar industries. Their extensive product range includes quartz plates, windows, observation windows, various quartz tubes and rods, quartz parts, boats, blocks, cleaning tanks, crucibles, beakers, and specialized quartz tooling for semiconductor applications. They offer OEM and ODM services, customizing products based on customer drawings or requirements. Utilizing high-purity raw materials from domestic sources, GE, and Heraeus, Donghai County Ruihai Trading Co., Ltd. exports a significant portion of its quartz products to Taiwan, Japan, South Korea, the United Kingdom, the United States, Germany, France, and Russia, among other countries. They also produce crystal products and glass smoking pipes.