Panasonic LUMIX LX3 equipped RICOH LC-1 Lens cap. I put 3 rubber blocks behind fraps. Its height is 4mm and has 4mm length, locates beside rib. Currently many Japanese users use rubber packing with dimension 30mm for inside, 38mm outside diameter with 4mm thickness. But the thing is,, too tight for Zooming. I don't like it. Please note that almost of inside rib of the LC-1 must be cut off for secure fitting. (less info)