Mushroom Universal timpani bag fits retractable leg type timpani in the following brands:Adams Universal, Adams Revolution, Majestic Harmonic Yamaha 3100 series The Mushroom Universal timpani bag is made from a rugged black toughened nylon and has 12.5mm foam padding on the tops and sides of the bag. The bags 'hug' the bowl, fully enclosing it for greater protection. There are 2 sets of side release clips to allow greater opening when removing the bag and pull the bag tight around the bowl. This allows it to be used as both a cover and a transport bag and because the wheels are not enclosed you can push the drum along instead of having to lift it. Each cover has the drum size on it for easy identification. 3 carrying handles around the top of the bag for 1 or 2 person lifting. Available in 20", 23'', 26'', 29'' and 32''. Usually in stock.