Features: *brand new with high quality *Made of material for long time use. *The size of the Vent hole is adjustable and easy to use. *Easy to open and close for better airflow control quiet and smooth control lever noiseless components. *Easy to install. *Direct fitment no modification needed. *It is a good to replace an old . Specifications: *Type: Damper Air Vent *Material: Stainless steel *Colour: Silver *Size: About 9.5x9.5x3cm *Scope of application: Oven test chamber high temperature and constant temperature box etc. Package Contents: 5x air vent Note: 1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2. Please allow slight manual measurement deviation for the data.