Rollstock® Vacuum Packaging Machines offer simple reliability in low cost machines. Available in a variety of web widths from 285 millimeters to 459 millimeters, all Rollstock machines feature programmable PLC controls with readable diagnostics and a vacuum leak check program. The chain system is guided and has an auto tensioning system. Dies are manufactured from solid aluminum block and lifted by a triple knee lever system, driven by a 4-inch air cylinder with variable height control.