We strive to match parts to the correct model number. However, companies sometimes change the parts they use and as such, there could be two or more different parts that go on the same model number for the same part type, such as two different carburetors for the same model of trimmer depending on the year it was manufactured. This being the case, we list the OEM part number and try to take quality pictures for you to compare your old part to. Grids are ¼” boxes to give an idea of the size of the part.