Black Mackintosh Cover for Steinway Model M Grand Pianos with side slits. Custom made cover for Steinway Grand Pianos. This cover will fit the 5'7" Model "M grand pianos. Our covers are made in the United States using only the highest quality materials. We have a video which shows more details about our custom piano covers.Our mackintosh covers are a combination of heavy water repellent drill cloth bonded to a soft cotton flannel backing. The mackintosh grand piano covers include the side slits so that the front of the cover can be folded back for playing without removing the whole cover. The item "Steinway Mackintosh Grand Piano Cover For 5'7 Steinway Model M Black" is in sale since Friday, June 24, 2016. This item is in the category "Musical Instruments & Gear\Pianos, Keyboards & Organs\Parts & Accessories\Other Parts & Accessories". The seller is "howardpianoind" and is located in Hamilton, Ohio. This item can be shipped worldwide.