Stratasys® PEKK Purge Ledge (Fortus 450mc) Stratasys Sale! 31800 /per Qty. Add to Cart SKU: 511-00800-S Compatibile 3D Printers Stratasys® Fortus (FDM Technology) Fortus 450mc Gen I Fortus 450mc Gen II Product Description Alternate Product Name: BLOCK, PEKK PURGE LEDGE