C428 1/2" x 5/16" Roller Drive Chain for Ride-on Mower lawn mower MEASUREMENTS width in mm: 7.90 Width in inches: 5/16 Length in m: 3.00 Chain pitch in mm: 12.70 Chain pitch in inches: 1/2 Chain type according to US: C-428 Diameter of the drive rollers in mm: 8.30 PART NUMBER: 22-729 ORIGINAL CODE: CZ