Frequently Asked Questions About OUPU Products
Find answers to common questions about OUPU’s door viewers, lock cylinders, master key systems, and door hardware accessories. Learn more about product materials, specifications, ordering requirements, OEM services, shipping, and quality certifications.
We manufacture door viewers in brass, zinc alloy, aluminum, and fireproof materials. Each material offers specific benefits — brass provides premium aesthetics and durability, zinc alloy offers excellent cost-effectiveness, aluminum is lightweight and corrosion-resistant, and our fireproof models incorporate intumescent seals for fire-rated door assemblies.
Our standard door viewers feature a 180° wide-angle lens, a patented design developed by our chief optical engineer. This provides a comprehensive view of the outside area without distortion. We also offer 160° and 200° variants for specific applications.
Yes, we produce euro profile cylinders, oval cylinders, thumbturn cylinders, and interchangeable core cylinders compatible with most major key systems. We can manufacture cylinders to match specific key profiles upon request.
Our standard door viewers support door thicknesses from 35mm to 55mm. Custom lengths are available for thicker doors (up to 80mm) upon request. Please specify your door thickness when ordering.
MOQ varies by product. Standard door viewers typically start at 500 pcs per model, while custom OEM orders may have different requirements. Contact our sales team for specific product MOQs — we strive to accommodate both small and large volume orders.
Yes, we provide comprehensive OEM services including custom laser marking of logos, model numbers and specifications, custom packaging design, and tailored product configurations. Our minimum OEM order quantity is negotiable based on project scope.
Standard production lead time is 15–30 working days depending on order volume and product specifications. Custom OEM orders may require additional time for mold preparation and sample approval. Rush orders can be accommodated — please discuss with our team.
We ship via sea freight (FCL/LCL), air freight, and international express couriers (DHL, FedEx, UPS). The shipping method depends on order volume, urgency, and destination. Our logistics team will recommend the most cost-effective option for your needs.
We export to over 30 countries worldwide, including the USA, Canada, European Union member states, Middle East, Southeast Asia, and South America. We hold our own import and export rights, ensuring smooth customs clearance.
We hold ISO9001:2015 quality management system certification. Our fireproof door viewers are UL certified (UL 10C and CAN/ULC-S104) for USA and Canadian fire protection standards. Products also carry CE marking and RoHS compliance as applicable.
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