SD-509 is the option for FS-527 finisher. Subsequently, FS-527 finisher is the option for many Konica Minolta color and black and white copiers( click on the FS-527 link to see the list of the models).
This item is long time discontinued and not available for the purchase. This page created as a reference ONLY.
If you need SD-509, the best course of action is to buy a used FS-527 with SD-509.