Specification Package: 20Pcs 53mm Air Vents Hole Material: Stainless Steel Color: Silver Tone, Brushed Surface Design : Mesh Hole, Round Shape, Bevel Mounting Diameter: 53mm/2.1inch Total Size: 64 x 9mm/2.5 x 0.35inch(D*H) 1. The Air Vent is made of Stainless Steel, durable, and strong ability to withstand gravity, not only oxidation resistance, but also more beautiful installation effect. 2. Applied to places such as offices, meeting rooms, auditoriums, music halls, etc. Sipery Service 1. Sipery is dedicated to producing a comprehensive, quality line of power tool accessories and hand tools for many years. 2. We guarantee your 100% satisfaction! If within 30 days you are not satisfied with our products, just return it for a full refund! No questions asked! 3. If Wanna more Tool Accessories, just search "Sipery". Kindly Note 1. Please allow 1-2cm errors due to manual measurement, thank you for your understanding! 2. Actual color may vary slightly due to differences in monitors and lights.