Husqvarna SB 48 48” Tractor Mount Snow Blade Replacement Model # 4504292669Husqvarna SB 48 – 48” Tractor Mount Snow Blade Replacement Model # 4504292669. The Husqvarna 48-inch Snow Blade is Husqvarna’s New Pre-Assembled Version!! One-time mounting bracket installation. Remove the blade without tools once the brackets are installed for transfer to mower deck. Blade.