18mm Diameter Lens Tube With ZnSe Focus Lens or 3pc Kit + Alignment Tool (50.8mm(2.0") W/Nozzle)

I love that the seller contacted me to make sure I was ordering the correct ones. Which i wasnt... Shipping was quick and the lenses work great! These are the second set I have purchased. One for my k40 and this set for my mf2028.