I have a collection of nib pens.

I have many J pens.

I bought some new brush pens for my art project.

I bought a set of brush-pens for my art project.

I bought a set of shading pens.

I bought some music pens to write notes during the concert.

I bought three 3D pens for my art project.

I have many potato pens on my desk.

I have two vapor pens.

I found a box of quill pens in the antique store.