Please note that this product is not for L lenses! Product number: 31132 I believe this product is already discontinued. Includes one spare screw and a dedicated screwdriver. Includes instructions, O-rings, and gear sheet (for adjusting the lens body and focus ring). I am selling this because I have upgraded to an L lens and no longer need it. If you purchase this item together with the macro port currently listed separately, I will discount the price by the shipping cost, so please comment.