This is an original replacement for the standard needle plate that came with your Janome sewing machine. The needle plate should be replaced when needle strikes leave sharp areas on the plate that can break thread or grab fabric. This needle plate is compatible with Janome models 521, 525S, 529, Sewist 500, Sewist 509, 6021, Sewist 625E, 659 Jem Gold, 660 (Jem Gold), 661 (Jem Gold 2), 662 (Jem Silver), 665 Jem Gold, 706NX, AQS2009, Jem Platinum 720 (JP720), Jem Platinum 760 (JP760), 7318, 7325, ME4014, NH2014, NH2014LE, NH40.