Pack of 2 - Laser # 91331 Hi-Lift Mulcher Blades - 21" Length - Replaces AYP / Husqvarna 137843 / 131323 / 138498 / 138971 / 532 12 78-43 / 432 13 13-23 / 532 13 84-98 Pack of 2 Laser # 91331 Hi-Lift Mulcher Blades OEM replacement blades for AYP / Sears / Husqvarna / Poulan / Roper 137843 / 131323 / 138498 / 138971 / 532 12 78-43 / 432 13 13-23 / 532 13 84-98 Cross over for Oregon # 195-032, Rotary # 6125, and Stens #'s 302-400 / 340-178 / 340-182 Length: 21" ; Width: 2-1/4" ; Thickness: 0.150" ; 5 pt. star center hole Requires 2 for 42" cut