Hoppe Round Rosettes for Euro profile cylinder 

The outside is thicker than the interior, Requires an offset cylinder

Exterior Diameter: 2-3/16  inch (55mm)  2.165 
Exterior Thickness:  9/16 inch  (15mm)  .590 
Interior Diameter:    2 inch  (52mm) 2.04 
Interior Thickness:  3/8 inch  (10mm)  .393  

Screw Hole Spacing: 1-1/2 inch  (38mm) 1.496  

Fixing: Concealed screws, bolt through M5 Thread
Finish: Stainless 
Base Material: Zamak Exterior, Steel Interior

Note: Zamak is base metal of zinc and alloying elements of aluminum, magnesium, and copper, typically used in die cast materials.