"THICKNESS 0.375 IN.; MATERIAL THICKNESS 0.375 IN.; TOOTH ARRANGEMENT - CONTINOUS; MATERIAL OUTSIDE DIA 5.875 IN.; MATERIAL INSIDE DIA 2.781 IN.; TEETH SET QUANTITY 1; TEETH PITCH DIA 2.500; THIS ITEM HAS BEEN REVIEWED FOR ASBESTOS MATERIAL. THE CURRENT APPROVED SOURCE, 17904, HAS INDICATED THEIR PART NUMBER CONTAINED ASBESTOS PRIOR TO 1984. THEY CONTINUE TO MANUFACTURE THE SAME PART NUMBER WITHOUT ASBESTOS MATERIAL AFTER 1984"