Oregon 99-112 Snapper Replacement Lawn Mower Blade For Rear Engine Rider 30-Inch Length: 30-inches Center: 1-inch Outer: 9/16-inches Center to Center: 7-1/2-inches Oregon product 99-112 will fit on the following models - LASER 91431, PLP 115-014, PRIME LINE (SIERRA) 7-04409, ROTARY 1092, STENS 335-307, SUNBELT B1SN3003