Janome Rectangle Bobbin Cover Slide Plate.
Will fit the following Janome models: MC12000, 11000, 11000SE, 350E, 6600P, 6500P, 7700QCP, 8900QCP, 8200QC, DXL603, 6260QC, 6125QC, 6019QC, 4035, QXL605, XL601, TXL607, 8050XL, XS50, JL5100, 230DC, 360DC, GD8100, 2030DC, 4300QDC.
Made out of clear plastic for clear visability to the bobbin so you can see how much thread you have left before it runs out. It clips or slides into place and covers the bobbin to stop it jumping out, without this Bobbin cover plate the machine will not stitch correctly without it.