Insertable flange diameter: 5.86" Inches; Use for 6" Inch Opening ; Outer diameter is 7.40" Inches - Ideal for room exhaust and intake ventilation use. Home improvement - For Intake or extraction use, for outside or inside, for walls or ceilings, great for garages, sheds, offices, bathroom, RVs or campers, and anywhere else air is desired to travel through Quality material: Louvre air vents are made of quality ABS plastic, environment friendly and non-toxic. Built-in fly screen mesh. Temperature range (°C): 0 ... +90 Easy Installation using Glue or Screws - They can be used for walls, ceilings, furniture and more. May be connected to dryer vent or any other VENT SYSTEMS HVAC part Great, simple and beautiful design. Reduce dust into kitchen or bathroom by fly screen mesh. VENT SYSTEMS is a company with a long tradition and experience. We provide innovative solutions in the field of ventilation of premises. We are constantly striving to develop and deliver even better, more advanced and more efficient technologies that would enable our customers to enjoy healthy fresh air indoors. All products undergo thorough quality control. We have a professional service and periodic maintenance system for maintaining system reliability for many years. We have created the value of the VENT SYSTEMS brand by putting particular emphasis on: QUALITY OF THE PRODUCT - WIDE RANGE OF PRODUCTS - MEETING THE CUSTOMER'S NEEDS.