Item Descriptions:-[Application]: Compatible with Husqvarna 320, 315. The reference OE number is 508043705.-[Dimension]: Size of this carbon brushes is about 6.3x11x29mm/0.25x0.43x1.14inch.-[Function]: Worn brushes are often the cause of a poorly running motor. Replacing brushes can fix an intermittent motor and can restore a motor's electric braking.-[Durable Material]: Make of good quality material, long service life, high strength and durability, ideal replacement for your old or worn part.-[Note]: Please kindly confirm the part number and size before ordering.Please allow 1-2mm errors due to manual measurement.Package:2 Pairs of Carbon BrushesItem Specifications:MPN:508043705Application:ChainsawTool Part Type:Carbon BrushMaterial:Carbon,MetalSize:6.3x11x29mm/0.25x0.43x1.14inch