Alro Plastics offers PTFE or TFE (polytetra fluoroethylene), a very dense material known for its chemical resistance and excellent electrical properties.
FOI 2013-00806.Responsive_Documents - Hanford Site
Steel 1/4 in Sheet/Flat Stock Thickness Industrial Metal Sheets
WSC-44BNS Steel Stand for 4 ft. x 4 ft. Platen - Weldsale