Feature●Punching holes are flat for easy removal of waste●Comes with a handle for easy access●Anti-microbial properties of copper reduce numbness●Care Instructions: When turning black, apply an equal amount of salt mixed with vinegar (household) and rub with a brush for 15-30 minutes, then rinse with waterDescription
Diameter 4.0 inches (102 mm)
Just place it on and antibacterial.
From the Manufacturer