（1）. In Size: 90mm
（2）. Out Size: 164.3mm
（3）. Hole: 10 holes Ring Flange
（4）. Thickness: 3mm,5mm,6mm,7mm,8mm or Customized Ring Flange
（5）. Material: 6061 Aluminium Ring Flange
（6）. Color: Plated Chrome or Color Ring Flange
（7）. The different specification of ring flange can be produced according to customer's requirement.