The ALM Manufacturing SL324 Bi-Component Line is manufactured to the highest possible specifications for ultimate performance and longevity. The 'bi-component' square profile trimmer line is a co-extruded nylon line offering the ultimate trimmer line. It has a soft, flexible core and hard outer cutting edges to ensure exceptional cutting performance and longevity. This product is designed to refill your existing spool and is suitable for ALL MAKES AND MODELS of medium-duty petrol grass trimmers using 2.4mm (0.095 inch) trimmer line. Line Diameter 2.4mm. Line Length 80 metre.