You are purchasing a small big band version accompaniment for the group Avalon's rendition of Winter Wonderland.  This is a truly great vocal jazz arrangement made famous on Avalon's "Joy" CD. This is a 222 horn section (2Tp; AltSx, TnSx, 2Tb) with general rhythm/piano and the original vocal parts from the Avalon folio.  There is a 544 full big band horn section version also available this link Winter_Wonderland_544_Big_Band_Vocal_SATB_-_Avalon_Version Jazz Music Download