HQRP Elastic Dust Cover w/ Bag for Casio AT-3 / AT3 / CTK-2100 / CTK2100 / CTK-2300 / CTK2300 Electronic Keyboard Digital Piano + HQRP Coaster HQRP&reg; 61-76 Keys Keyboard Dust Cover, Black plus HQRP&reg; Coaster; HQRP dust cover is made of spandex and having exceptional elasticity is suitable for most 61-76 keys keyboard models. It is especially designed to protect your instrument from dust and moisture. The dust cover is equipped with a special bag having a plastic cord and locking clasp for easy storage. 200 days warranty!