Services Heating Plates Custom heating plates made from 6061 aluminum or 316 stainless steel. Sizes range from 3x3 inches up to 8x8 inches. Cartridges SHO heater cartridges use a unique, split-sheath design that allows the heater cartridge to expand when powered. Customize We have the manufacturing capabilities to build whatever components you require in your heat press. Contact us to discuss your needs.