Heater membrane or membrane for water body.

Compatible Junkers model: 

7703331989 Wr400-1KD1P 23S2800  

Characteristics: 

• With ear.
• Diameter: 51mm
• Inner diameter of ear: 6mm
• Outer diameter of ear: 11mm
• Engraved Letter Aluminum Shaft: C
• Aluminum Axle Height (where the letter C is engraved): 15 mm
• Aluminum Shaft Diameter (where the letter C is engraved): 6.55 mm