88-key hammer-action piano-/fully-weighted KEYBED ASSEMBLY (all keys of mechanical keyboard section) REPLACEMENT PART for Kurzweil K2500X or K2500XS workstation synthesizer keyboard. TESTED WORKING ALL KEYS velocity, aftertouch, all hammer-weights intact, and needs replacement plastic keytop only for top-C key (sensors and hammer-weight beneath work), see photos. Compatible only with 88-key K2500X and K2500XS models, NOT compatible with 76-key K2500 and K2500S models. Used complex mechanical assemblies like this may need some cleaning, lubrication, adjustment, maintenence to your preferences. Please see all photos for physical condition and ask any questions. Listing includes everything pictured and only what is pictured. Thanks for looking!