Features: 1.Easy to install, replace your door viewer in 5 minutes with no tools required. 2.The lens will secure your home against burglary, intrusions and home invasion. Specification: Type: door viewer Color: BP Material: Zinc alloy + Resin lenses Suitable for opening: diameter 16mm Suitable for door thickness: 35-55mm Degree: 200  Package included: 1 xdoor viewer   Q1. Are you a manufacturer or trading company? A1:We are a professional door and windows seal manufacturer with more than 30 years 'experience for domestic and International market. Q2. What is payment method? A2: For samples: T/T, western union. For orders: We prefer T/T, other ways should be confirmed first. For new customer,30% advanced payment before producing ,70% before delivering usually. Q3. Do you offer free samples? A3: Free samples are available . Q4. Do you offer OEM service and can you product as our drawings? A4: Yes, we can customize according to your drawing , or make drawing according to sample as your requirement. Q5. Do you accept our design on boxes? A5: Yes. We accept. Q6. What's your delivery time? A6: Generally, we will arrange shipment within 7-30 days after receiving the deposit and according to your purchasing quantities. Q7. How do you control the quality? A7: We will arrange sample confirmation before production if you need . During the production, we have professional QC staffs control the quality and manufacture in accordance to your confirmed samples. Welcome your visit to factory.