These keys will fit the RD-600, A-90 FP1, FP9 along with those listed below. Some are slightly yellowed and we can not guarantee an exact color match with your existing keys. 

Roland A-90
Roland A-90 EX
Roland FP-1
Roland FP-9
Roland HP-145
Roland HP-147
Roland HP-236 
Roland HP-237
Roland HP-237E
Roland HP-245B
Roland HP-330
Roland HP-535 
Roland KR-370
Roland KR-375
Roland KR-570 
Roland KR-575  
Roland KR-575P
Roland KR-770
Roland MP-300
Roland XV-88

Roland RD-600