One pair of extremely effective room treatment panels measuring 16 1/2 x 48 x4 inches each.  Well constructed pine frames with plywood front and back, and filled with 3 1/2 inch thck mineral wool.  Rear panel has keyhole cutouts for easy hanging vertically or horitzontally.  The stock painting is all white with a black front as pictured, but can easily be painted to match your own decor.  We recommend placing behind your stereo speakers at the level that works best for you.   They may be placed directly on the floor or hung on the wall.  We have found it to be ideal to place a second pair on the walls opposite your speakers as well.  The pure sound panels can transform any room into a cocoon of sound.