FALDPSR - Falcon Safety Products Falcon Dust-Off DPSR Plus Refillable Cleaner Sold as 1 EA. Refill for Falcon Dust-Off Plus Spray contains clean nontoxic gas that quickly removes dust, lint and other contaminants from computers, CRTs, disk and tape drives, diskettes, media storage files and general office equipment. Refill contains 100 percent ozone-safe gas and has no CFCs, HCFCs, propane or butane.