Pet Brush - Copper Made of copper, it has antibacterial effects. It was written at the time of purchase that it doesn't generate static electricity, so it's less likely to break the hair, etc... Hair loss There is some discoloration on the copper part of the brush, but I think it will be clean if you wash it with citric acid, etc. My pet has a lot of hair, so I'm using another brush, and I'm selling this one. #CrispDogGoods Dog Cat Brush Care Supplies Brushing Wooden Copper