ROBUST DESIGN, COMBINED WITH TECHNOLOGY, THE SMART LINE HAS AN EXCLUSIVE PULLEY SYSTEM. WITH EXCEPTIONAL BIOMECHANICS, WORK OUT YOUR LOWER LIMBS WITH THE SMART LINE LEG EXTENSION. •DESIGNED FOR DIFFERENT BODY TYPES AND TESTED AT UNIVERSITIES TO DEVELOP A TECHNOLOGICAL AND ERGONOMIC PRODUCT. •HIGH-DENSITY FOAM, COMPATIBLE WITH DIFFERENT HUMAN BODY TYPES AND DESIGNED TO WITHSTAND USE FOR MANY HOURS A DAY. •ELECTROSTATIC EPOXY POWDER PAINTING TO PREVENT CORROSION AND INCREASE DURABILITY. •WITH TWO WEIGHT STACK OPTIONS OF 110 KG OR 140 KG.