HQRP Elastic Keyboard Dust Cover for Yamaha PSR-I425 PSR-S500 PSR-S550 PSR-S710 PSR-S900 PSR-S910 Digital Piano Synthesizer + HQRP Coaster HQRP&reg; Keyboard Dust Cover plus HQRP&reg; Coaster; Dust Free Spandex Material Stretches to fit 61 or 76-key Keyboards; Comes Complete With a built-in bag, Plastic Cord and Locking Clasp; 200 days warranty!