The Innovative Percussion IP240 Soloist Series Medium Marimba Mallets are designed for use in the middle 3 octaves of a 5 octave marimba but offers more articulation than the IP200 model.  The IP300 Soloist Series Medium Hard Marimba Mallets are slightly harder than the IP275 model and are designed primarily for use in the upper 4 octaves of a 5 octave marimba.  The mallets feature 100% wool yarn which is custom made for Innovative Percussion.  Birch handles and hard rubber cores help to create a tone that is rich and full.