Apparatus for back massage characterized in that it consists of a metal support with through holes and a rod, two balls with through holes, two blind nuts, four rubber washers, four screws and four studs of nylon. (Machine-translation by Google Translate, not legally binding)1. Aparato para masaje de espalda caracterizado porque se compone de un soporte de metal con agujeros pasantes y de una varilla, dos bolas con agujeros pasantes, dos tuercas ciegas, cuatro arandelas de caucho, cuatro tirafondos y cuatro tacos de Nailon.
