The Fella 102183 Pentajet Left Knife is a genuine OEM replacement part designed for Fella SM series disc mowers. This high-quality knife ensures efficient cutting performance and durability. It features a length of 100mm, a width of 40mm, a thickness of 4mm, and an 18.5mm hole diameter. Weighing 0.12 kg, it is specifically engineered for models such as SM 280 FP, SM 320 FP, SM 360 FP, SM 400 FP, SM 400 FP-KC, SM 400 FP-RC, SM 470 FP-KC, SM 470 FP-RC, SM 520 FP-KC, SM 520 FP-RC, and SM 520 FP-KC-RC.