The 509B is at the higher end of the Aulos alto recorder range and is tailored to suit the more advanced player. It is made from durable, dark brown ABS plastic and features the smart 'ivory detail' which is seen on many traditional school recorders. The recorder has a curved windway and a concave bell which together allow for a rich, mellifluous sound. The response is better than cheaper models and hence the player can be much more expressive. The body can be separated into 3 parts for easy maintenance and will fit neatly into the accompanying 'leatherette' bag. It is supplied with a fingering chart, cleaning rod and joint grease.