Mulching blades are ideal for finely cutting grass clippings into recycleable material to ferilize your lawn Fits Walk-Behind, Push and Self-Propelled Mowers with a 21-inch Cutting Deck, (1995 - ) For Troy-Bilt, Cub Cadet, MTD, Craftsman, MTD Gold, Bolens, White Outdoor, Murray, Snapper, Yard Machines, Yard-Man and Huskee. Fits Cub Cadet CC469, CC989, CC997ES, PR521, S621, S621SS, SC621, SC621E, SR621, SRC621, SRE621, CC439, CC949, CC94M, CC98M, PR521, CC46M, CC46MZ, CC94M, CC999ES, SC 100 H, SC 100, SC 100 HW, SC 700 H, SC 700, SC 300, SC 300 HW, SC 300, SC 500 Z, SC 500 HW, SC 500 Z, SC 300 E, SC 300e, SC 500 EZ, SC 500 EQ, CC46ES, CC99M, CC98, CC98H, CC98K, 5521, 214 IP, 214 KW Fits Troy-Bilt TB449E, Tru-Cut 110, Tru-Cut 100, Tuff-Cut 200, Tuff-Cut 210, Tuff-Cut 220, Tuff-Cut 230, Pro-Cut 300, Pro-Cut 310, Pro-Cut 320, TB 105, TB 110, TB 115, TB 120, TB 125, TB 130, TB 130 XP, TB 140, TB 160, TB 160 XP, TB 200, TB 210, TB 220, TB 230, TB 240, TB 270 ES, , TB 270 XP, TB 280 ES, TB 290 ES, TB 320, TB 330, TB 360, TB 360 ES, TB 370, TB 370 XP, TB 380 XP, TB 380 ES, TB 400 XP, TB 430 XP, TB 450 XP, TB 490 XP Fits White Outdoor LC-436, LC-149, HW-615, HW-656, HW-456, W-56MC, LC-210, LC-215, LC-210SS, W-995, LC-215E, W-54K, W-54MB, W-54MC, W-83MC