Part numbers for reference M154621 single sided v belt 1/2" 13mm wide. fits John deere X300 X304 X310 X320 42"M MULCH SECONDARY blade deck BELT M138583. X310 42" X deck. Fits John Deere M154897 M172924 Primary Deck Belt X300 X500 X310 X320 42" M 48".
