0.020" thick 18" x 18" thermoform plastic sheets - 6 Piece Bundle Smooth on both sides High impact strength. Resists stress cracks and chipping Forming Temperature: 325 - 350 degrees Fahrenheit Cut, drill, and sand with woodworking tools. Accepts paint and ink WidgetWorks Unlimited Thermoform Plastic Sheets are perfect for inventors, small businesses, and DIY hobbyists who want to make custom vacuum formed plastic parts. Use these plastic sheets along with WidgetWorks Unlimited Hobby Vacuum Formers and a kitchen oven to thermoform homemade plastic parts with results that rival expensive commercial machines. Make your own plastic prototypes, clamshell and blister packaging, custom molds, scale model parts, and movie props. High Impact Styrene is an inexpensive thermoform plastic that is easy to work with and produces excellent vacuum forming results, making styrene the perfect "beginner plastic" for folks who are new to vacuum forming. High Impact Styrene is capable of reproducing intricate mold details along with complex part geometries. It is smooth on both sides, comes in opaque white and opaque black, and readily accepts paint.