Lawn mower blade compatible MODELS ONLY Primo 550 H, Primo 550 R, Primo 550 HR, Primo 550 RS Features: Length (mm): 480 Centre hole (mm): 32 Outer hole (mm): 6.8 / 12.5 Centre to centre distance (mm): 86 / 95 Weight:819 g Code: 7025043995 Reference code: 5043995 ONLY