MATERIAL: The trimmer line is made of durable flexible for tough cutting, ensures durability and is not easy to break. Can cut different lengths according to different needs. SIZE: Heavy duty serrated trimmer line, sharp square edge for aggressive performance EASY TO INSTALL AND USE: Fits most brands and models of grass trimmers. Great replacement for replacing the trimmer line when you run out. WIDE APPLICATION: The strimmer line can be applied to agriculture, landscaping or gardening and horticulture. Suitable for brush cutters and grass trimmers. Mowing Line Shape: Serrated Type: Garden Tool Parts Use: DIY Color: Black Material: Nylon Size: 3mm in diameter, about 50m in length Package Contents: 2 x Nylon Trimmer Line Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in a little different from the real thing. The measurement allowed error is +/- 1-3 cm.