Polystyrene auto plate inserts are made of white 20-mil polystyrene sheet stock. Plate inserts are available in 43 standard screen-print colors. (Fluorescent Colors not available for Auto Plate Inserts). Additional colors can be added at extra cost. See items below. Your artwork can be submitted, or we can help you with a new design. There will be no art charge for most designs. Please allow a minimum of 10 working days for production after acceptance of artwork by manufacturer. Auto plate inserts measure 6" x 12". Pre-drilled round holes are standard. Oval holes are optional at an extra cost of .08 per plate. Click Here to view Standard Screen Print Colors - (opens new window)