Blade holder hub compatible with TORO lawn tractor mower mowers models Z MASTER Z253 Z MASTER Z255 CHARACTERISTICS Mounting flange to bottom edge in mm: 47,40 Mounting flange to top edge in mm 69.00 Bolt hole in mm: 172.00 Upper belt groove width in mm: 14.00 Shaft length in mm: 116.40 Number of holes/bolts: 6 Upper sheave Ø in mm: 139.80 Blade holder: U deflector CODE: ORIGINAL CODE: TORO 99-4640 CZ