MATERIAL]Made of 201 stainless steel material, environmental-friendly, safe, sturdy, durable, anti-rust and corrosion resistant.Fine workmanship, beautiful decor for home, modern new house necessity. [DESIGN]Design of round flat cover with Louver and built in fly screen mesh,inside louver design has secondly rainproof effect to prevent rain from damage,fly sceen mesh to prevent small pet into house. [EASY INSTALLATION] The could be controlled to meet your demand by adjusting the regulating valve of our , convenient and practical. Can be perfectly installed on the ceiling or wall, also very easy to disassemble for conveniently cleaning. [WIDELY USE]The ventilation duct cover can be perfectly used for indoor exhausting, lower noise, perfect for bathroom vents and extractors, air conditioning units, kitchen fans and vents, all home wall vents, gas and electric dryer etc.. 200mm / 8 inch, for all kinds of home pipe ventilation and industrial use. Specification: Material: 201 Stainless Steel Color: Silver size: As Pictures Shown Package list: 1 X Round Grille 2 X Screws 2 X Expansion tube Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.