Yamaha PSR Style Disks for Yamaha Keyboards - ROCK & ROLL, CLIFF & THE SHADOWS Compatible with Yamaha PSR 4000, 7000, PSR 8000, PSR 9000, PSR 9000 Pro, PSR 340, 540, 640, 740, PSR 350, 550, PSR 630, 730, PSR 1000, 2000, 1100, 2100 and Yamaha Tyros1
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