I have ordered a kit from another supplier but they won't be shipping in a few weeks and I need it NOW. That's why I ordered this set. The plastic/teflon bushing was too small to fit the 1.5" pen. Luckily I had access to a milling cutter and reamed the bushing .030. Today I received the original kit, measured the sleeve, it's 1.522. It will fit with no problem.