We do know that our music does not kit the foreign made instruments sold in mass merchandise or mega mart stores. While those instruments may be shaped the same and have nearly the same dimensions as TK O'Brien's which are the instruments we promote, even slight string spacing differences will make the music unworkable. Also, the dimensions between the bridges are not the same. Besides being found on our site, you may find TK O'Brien's Lap Harps in some fine folk music shops as well as hand crafted shops and other unique locations. You will never find them in mass merchandise stores. If you do purchase this music for lap harps other than TK O'Brien's as shown on this site, please understand that it is not returnable.