Unfortunately, FURminator does not sell replacement blades or parts for the FURminator deShedding Tool. If you find replacement blades/parts for sale anywhere, it is likely not a genuine FURminator product – beware!
However, according to their website:
The FURminator brand offers a 30-day money-back satisfaction guarantee*.
*GUARANTEE: If you are not satisfied with this product for any reason, send your written request to the address on the package, together with the dated store receipt showing the price you paid. Please allow 6-8 weeks for processing.