Parker, PAR3021531, Rollerball Ink Refills

I had an old Parker pen that used a fibre-tip insert. That option had long aged out of service as better tool found their way into the market. I had pen casing but no insert. I found that Parker had a roller-ball insert that closely matched the dimensions of the fibre-tip. Zoro provided decent delivery with excellent pricing. Recommend to everyone. [This review was collected as part of a promotion.]