Roland PA-4B S-KEY HAMMER fits most Roland keyboards. 

RD-500, RD-600, A-90, HP145, KR370, KR570, XV88 and more. If you are unsure if this is the correct part, please contact us.

Also fits: A-90, A-90EX, FP-1, FP-8, FP-9, HP-145, HP-147, HP-236, HP-237, HP-237E, HP-245, HP-2800, HP-2800G, HP-2880, HP-330, HP-330E, HP-335, HP-3800, HP-3800G, HP-530, HP-530E, HP-535, HP-550G, HP-555G, HP-5700, HP-730, HP-7700, KR-1070, KR-370, KR-375, KR-4300, KR-570, KR-570W, KR-575, KR-575P, KR-770, RD-500, RD-600, XV-88