Dust-Off Plus Refillable Chrome Valve Cleaner blasts away unwanted dust and dirt from virtually any office equipment surface, especially useful in getting to hard-to-reach places. Contains a clean nontoxic gas spray 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. Compatible with other chrome valve refills.