Gas spring compatible with TORO lawn tractor lawn mower models Z147 Z MASTER, Z148 Z MASTER, Z149 Z MASTER, Z150 Z MASTER, Z153 Z MASTER Z400 Z MASTER, Z449 Z MASTER, Z450 Z MASTER, Z453 Z MASTER, Z500 Z MASTER Z553 Z MASTER, Z555 Z MASTER, Z557 Z MASTER, Z587L Z MASTER, Z588E Z MASTER Z593-D Z MASTER, Z597-D Z MASTER PART NO: ORIGINAL PART NUMBER: TORO 103-2913 103-4079 109-2339 CZ