JMS SYSTEM Catalogexterior walls. The main feature of the JMS Eco wall panels is that it is lightweight and has excellent heat preservation, heat insulation, sound insulation. Together with the steel structure it constitutes the structure's anti-side force system and greatly ..... FOR JMS LIgHTWEIgHT panelS. PERFORMANCE INDEX of LIgHTWEIgHT panel. Other sizes are available on request. Other sizes are available on request. SPECIFICATIONS. 60. 90. 120. 150. 180. 200. THICKNESS (mm). 60mm.