This Altoz 2500534 Gator G6 Blade Kit is for the 21" Blade on XC/XP/TRX/TSX Series. Authorized Altoz replacement blades are designed for superior grass processing whether you are mulching, side discharging or bagging. Altoz quality is defined by superior components working in unison to deliver intuitive and responsive mowers with a professional-grade cut to get even your toughest jobs done with speed and power.