... last longer, resist cracking, and stay flexible. Residential grade.Nylon trimmer line(grass cutting line)1.Four cutting edges woven throughout ... air flow for cleaner,smoother cutting.2.Fits all standard trimmer heads3.Long lasting co-polymer material.4.Shape:Round,square ... ,5.diameter:1.0mm-5.0mm6.package:card head,bobbin,pp bag.7.Accept your logo,your brand nylon ...