Type I One piece lightweight 6-7 PCF glass fiber core with square or radius edges covered on all sides with fabric, vinyl, Tedlar or painted. Available in thicknesses of 3/4" and up.	Type II Two pieces of 6-7 PCF glass fiber with square bottom edge and corners wrapped with a single piece of fabric or perforated vinyl; seamless bottom edge. Available in thicknesses of 3/4" and up.	Type III Two pieces of 6-7 PCF glass fiber with square or radius edges and corners, covered with perforated vinyl or fabric. Available in thicknesses of 1" and up.