These are parts to add active CPAP Filtering to a 3M 6800 or similiar Mask.
Required extra Parts:
1inch Hose
These DAR adapters for 6800/similar: https://www.printables.com/model/28585-3m-mask-to-dar-filter-adapterhttps://www.printables.com/model/28585-3m-mask-to-dar-filter-adapter
The author marked this model as their own original creation.