This is a set of 2 Bush Hog Blades OEM Part # 7555 for Bush Hog Models:

Dimensions:  1/2 x 4 x 24 3/4

12   5ft cutter 
285  5ft cutter
295  5ft cutter
305  5ft cutter
325  5ft cutter

296 6ft cutter

Right side on 2610L, 3710, 2012, 2315, 2615 & 2615L, 3715, 2415, 2515