CleanTex Accuduster III Disposable Ozone-Safe Duster, 10 Ounces Each, 4 Cans (CT2510) Removal of dust, lint, and oxide particles from electronic equipment, optical surfaces, and precision instruments Trigger-operated valve delivers fingertip cleaning control Includes 6 inch extension wand for access to hard-to-reach areas Contains HFCs; 100% ozone safe; Nonflammable Four 10 ounce cans