For use with room temperature cure silicones and urethanes. Each frame set consists of two clear plastic plates, a U-shaped extruded aluminum frame with sprue forming button, and four heavy duty rubber bands. Rubber compounds will not stick to the plastic plates as they often do with glass. Frames measures 1 7/8" x 3" and are available in several thicknesses.

For room temperature cure silicones and urethanes only.