MTD YARD MAN GUTBORD FOR MOWER MODELS 48 GTX2100 , PROZ100-48 , XZE 122 , Z1 122 , Z-FORCE48S , Z-FORCE SZ48 MODEL - TECHNICAL SPECIFICATIONS LENGTH 432 mm CENTRAL BORE 19. 1 mm OUTER HOLE -mm CENTRAL HOLE INDEX - mm CODE: 13271799 ORIGINAL CODE 742-04417 , 942-4417A , 01005336 , 0200517 SR