Mulching Blade / Murray 56252E701MAPack Size:1Murray 56252E701, Murray 056252E701, Murray 056252E701MA, Murray 56252E701MALaser 91171, NHC 212-0817, Oregon 97-005, Oregon 96-365, Prime Line 7-06416, Rotary 6144, Sunbelt MU2615, Sunbelt B1MU2615Murray Requires 2 for 42" deckLength: 21 3/8 ", Center Hole: 13/16 ", Width: 2 3/4 ", Thickness: .134 ", Requires 2 for 42" cut