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K-MAINS 9V AC Adapter Charger Replacement for Casio CT-650 CT-657 CT-680 Power Supply Cord Mains - Walmart.com
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BERLS 9V Power Supply Adapter for Casio Piano Keyboard CTK Series CTK-120 CTK-330 CTK-491 CTK-515 CTK-551 CTK-630 CTK-700 etc. - AliExpress
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K-MAINS 9V AC Adapter Charger Replacement for Casio CT-650 CT-657 CT-680 Power Supply Cord Mains - Walmart.com
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