This is a set of replacement ceramic discs and a dedicated tool specifically for Dosisha humidifiers and aroma diffusers. This item was originally included with a Dosisha humidifier. It is new, unused, and unopened, but the packaging has some minor folds and scratches. Dedicated tool for convenient ceramic disc replacement. - Model Name: IMM-DISC001 - Purpose: Ceramic disc replacement tool - Features: With ring fastener Thank you for viewing.