Sensor Swabs™ are designed for cleaning CCD chips & other delicate or hard to reach optical & imaging surfaces. Clean room manufactured & sealed, these swabs are the ultimate in purity. Sensor Swabs must be used with Eclipse or E2 Cleaning Fluid, available separately Size Three for Canon 1 Ds MK 1/2/3 5D, Nikon D3, Kodak SLR c/n Fullframe Cameras