THIS IS A NEW SET OF THREE OEM HI LIFT BLADES FOR A ALLIS CHALMERS OR SIMPLCITY WITH 42" LEFT HAND CUT,THEY ARE 14-1/2"LONG,2"WIDE WITH A 3/4" CENTER HOLE,THEY REPLACE 1656144 & FIT GTH-L,700,900,7000 SERIES NEW STYLE,I HAVE MANY OTHER BLADES IF YOU ARE LOOKING FOR SOMETHING.PLEASE SEE MY OTHER AUCTIONS.OEM NUMBER 1656144ASM   3-1/16" CENTER TO CENTER ON OUTER HOLES