Make the Curogan Pinch Collar  Longer with Extra Link
  
  If your dog wears a pinch collar during everyday walkings or  professional trainings you may need extra links for this collar.  Because it is common case when dog gains weight or if you are an  owner of a puppy then your dog grows by leaps and bounds. It will be  very smart of you to save money and buy extra links for your pinch  collar instead of buying new one. Save your money with Herm  Sprenger. 
  These Extra Links are for Herm  Sprenger  Ordinary Curogan Pinch Collars as well as for Curogan Pinch Collar  with nylon loop width 1/8 inch (3.25 mm). They snap in easily for extra  length!  No special skills or tools required to perform this action.
    
One link will add 1 2/5 inch (3.5  cm) to the total collar's length.
    Why did HS use Curogan in producing  these links?  Because Curogan - is a copper-tin-alloy with a high copper portion  and some additives which make the material strong - but without any  nickel. Therefore these chains avoid a discolouration of fair haired  dogs. After selling these articles for six years, the experiences of  our customers show that still some dogs (less than 10%) do react on  Curogan with a discolouration. A further advantage of Curogan  is the fact it is absolutely free of nickel. More often nickel is  also responsible for allergic reactions of sensible dog's skin and  causes for example skin rashes. That is why HS chose this alloy with  love and caring for its customers.