Dust-cleaning bar: * the rubber bar head has viscidity,convinient for sticking dust,particle and oil pollution.It can effectively clean the DSLR"s optical sensor,optical lens and other optical devices. * Viscous cleaning paper: * it is coated with non-shedding colloid material.It is helpful to clean the dust on the dust-cleaning bar.Peel off the sticker,and cleaning the dust-cleaning bar gently.