Three-head electric air machine 1. Avaliable for air or electric 2, Suit to install 3 pcs 80mm padsor1 pc 200mm pad 3,Well Three-head electric air machine ModelSpeed(RPM)InchWeight(KG)STPGJ 3000/ 4500 3'' 4'' 8''12Feature: 1. Avaliable for air or electric 2, Suit to install 3 pcs 80mm pads or 1 pc 200mm pad3,Well Equilibrium4, High efficiencyDetails show: Three-head electric air machine