Joystar Replacement Parts of Pro Extractor Blade ,Compatible with nutribullet rx 1700W Blender Model: N17-1001/ Motor base NB-301S Blade material: stainless steel +PP Will not fit for 250w 600w 900w 1000w 1200w Blender machine The RX Blade of JOYSTAR are just general parts fit blender which showed above point Package: 1 pcs rx extractor blade