ALM Manufacturing ALMSL018 SL018 Heavy-Duty Petrol Trimmer Line 3mm x 15m ALM Manufacturing Replacement Trimmer Lines to fit most models of garden trimmers. Available in various lengths and thicknesses. Manufactured in the UK. This ALM Manufacturing SL018 Heavy-Duty Trimmer Line is suitable for use with all heavy-duty petrol trimmers (36-39cc). Specification: Diameter x Length: 3mm x 15m Colour: Red