A very pretty eyedropper pen marked HYL on the anodised aluminium barrel band. This pen is fitted with a No. 5 steel niband is a full demonstrator pen. The only part of the pen that is not transparent is the feed (and the nib and band of course). It has an integral O-ring (also transparent) on the section threads to ensure an ink-tight seal when screwing on the barrel. This pen is supplied in a transparent plastic box along with a small eyedropper pipette.