Original blade hub for GRIN traction mower HM46A - PM46 PRO - HM53A - PM53 PRO - SPM53 PRO Adaptable to GRIN blade 46cm - GRIN blade 53cm Hub height: 100 mm Upper diameter: 47 mm Lower diameter: 62 mm Upper hole diameter: 22 mm Lower hole diameter: 8 mm Traction height: 25 mm Traction diameter: 47 mm Shaft traction hole diameter: 22 mm Code ASM-0012