EINHELL COMPATIBLE lawn mower mower blade Features : Length (mm): 500 Centre hole (mm): 19.2 Outer hole (mm): 12.7 x 18.6 Centre-to-centre distance (mm): 59 Weight: 826 g For models : BG-PM 51 SD, GH-PM 51 SD Part No. : 13286736 Original part No. : 3405760 EINHELL SR m