Mulching attachment effectively controls clippings at all three blades for improved mulching and more even distribution of mulched clippings. Plastic molded part will not rust. The mulching attachment is held in place with wing nuts on top of the mower for easy installation. Special mulching blades are included. These blades can also be used for side-discharge mowing with a Power Flow material collection system, though overall cut quality may decline slightly. Product Dimensions Weight 17.36 lb Height 6.5 in Width 19.3 in Length 52.5 in Volume 0.075 gal Model Compatibility: 47 IN. 47 IN. SNOW BLOWERS 48 IN. DECKS 54 325 335 345 GT235 GX255 GX325 GX335 GX345 GX355 LT150 LT166 LT180 LT190 LX280 LX289 SST15 SST18 X300 X304 X310 X320 X324 X360 X475 X500 X520 X534 X540 X590 X700 X710 X730 X734 X738 X739 X750 X754 X758 Z425 Z435 Z445 Additional models may not be listed.