The RMC Tokina DOUBLER is a Japanese-made 2x teleconverter for Nikon F-mount, complete with a dedicated pouch. It doubles the magnification of your existing lenses. I've used it about 4-5 times since purchasing it, and it's in clean condition with no mold or dirt on the lens. - Brand: Tokina - Model Name: RMC Tokina DOUBLER - Accessories: Dedicated pouch - Mount: Nikon Mount - Feature: 2x Teleconverter Thank you for looking.