LANBITOU 4pcs 3059 Fine Nib Piston Fill Fountain Pens Transparent Pen Set of 4 Go to amazon.com Related posts Top 10 recommendation fountain pen wingsung 2022 Feature100% brand new , no gift box, no ink insideConverter : Screw type, Only use bottled inkPlease pull the end of the pen out a little, then screw the piston to fill inkLength: 140mm x 15mm(Dia)Material: Resin