FilterKlear is a necessary photography tool for anyone using filters whether it be a DSLR camera or a Drone camera. Comes with a handy retractable dust removal brush and a special non liquid cleaning element designed to never dry out. Safe and very easy to use. Outperforms all other cleaning devices don’t let your photos be spoiled by a dirty filter! Full size LensPen 11cm long with a round cleaning tip measuring 12mm in diameter Cleaning tip is slightly concave to match filter Carbon cleaning technology