Husqvarna 537338305 Line Trimmer Spool Assembly Genuine Original Equipment Manufacturer (OEM) Part This part is compatible with models including; 125C-CANADA,125C,358791300,GT2126 This is a manufacturer substitution. Part may differ in appearance but is a functional equivalent to prior parts including; 5373383-03 Genuine Original Equipment Manufacturer (OEM) part. Compatible Brands: Husqvarna,Poulan,Craftsman This spool assembly (part number 537338305) is for line trimmers It fits inside the cutting head to cut grass and weeds