"REINFORCED FIBERGLASS CLOTH,THERMO-CHEM 6-88,JOHNS-MANVILLE; TRUNCATED CONICAL SHAPE; 5.240 IN. MAJOR DIA; 2.650 IN. MINOR DIA; 4.000 IN. H; EXPANSION SLITS ON SMALL END 1.250 IN. LG; ACCOMODATES 3.000 IN. DIA TUBE; CONSTANT OPERATING TEMPERATURE RANGE 204.0 DEG CENTIGRADE"