• 
  Alu / St
  (Aluminum-Steel)
  
  
• 
  St / St
  (Steel)
  
  
• 
  A2 / A2
  (Stainless steel)
  
  
• 
  A4 / A4
  (Acid-proof)
  
  
• 
  Alu / A2
  (Aluminum-Stainless steel)
  
  
• 
  Alu / Alu
  (Aluminum-Aluminium)
  
  
• 
  Cu / St
  (Copper and Steel)
  
  
• 
  Cu / Bronze
  (Copper and Bronze)