"7MULTIPLE PLY,INNER PLY,FIBERGLASS FABRIC,RUBBER COATED,INNER SURFACE ALUMINIZED HEAT REFLECTIVE,OUTER PLY,FIBERGLASS FABRIC,SILICONE RUBBER IMPREGNATED,BLACK COLOR,2.670 IN. LG,1.000 IN. ID,3.900 IN. W,1.550 IN. CENTER SPAN LG,BOUND WITH GLASS THD"