Each order includes 2pcs quantity. 
 Overall 6.5Inch.  No abnormal sound, no vibration. Internal welds will not impede airflow
Stainless Steel 201. 
USA customer could place the order on website directly.
Prices shown are wholesale prices in Los Angeles, USA. 
 
If you need China factory prices or other style parts or China bulk order price,  please contact us. ( Or Download  catalog by yourself. Service~Universal Catalog)