Watlow PM4 EZ-Zone temperature controls is a 1/4 DIN size (92mm x 92mm). This family can be offered as a FM Limit, Single Set Point, or Ramp/Soak controller based on model number. With a max output count of six outputs, based on configuration. The PM4 is a large display American made product. Call Seagate today if you can not find what you need.