Husqvarna 545003378 Line Trimmer Engine Piston and Cylinder Kit Genuine Original Equipment Manufacturer (OEM) Part This part is compatible with models including; GC2126C,BC2126,125E,125LD,125RJ,358791300,125R,358791980,125LSST,125L,GT2126,GC2126,125C-CANADA,125R-CANADA,125E-CANADA,125C,125LDX,CC2126 This is a manufacturer substitution. Part may differ in appearance but is a functional equivalent to prior parts including; 545001001 Genuine Original Equipment Manufacturer (OEM) part. Compatible Brands: Husqvarna,Poulan,Craftsman This engine piston and cylinder kit (part number 545003378) is for line trimmers Let the engine cool before installing this part