FourShow 100Pcs Plastic Replacement Blades Compatible with STIHL Polycut 2-2 Polycut 3-2 Grass Trimmer FSA 45 FSA 57 FSE 52,Sun Joe 24V-GT10, Redback Swift 40V Material:PA6 nylon. Length:Original 90mm long. Fits models:For STIHL Polycut 2-2, Polycut 3-2, FSA 45, FSA 57, FSE 52,replacement for OEM Part: 40080071000 Fits model:Compatible with Sun Joe 24V-GT10 24-Volt iON,RedBack SWIFT 40V Grass Trimmer Quantity: 100Pcs plastic blades compatible with STIHL Polycut 2-2,Polycut 3-2, perfect replacement of the original blades. Good for grasses and thin brush, not for saplings or other hard material. Made of PA6 (Nylon), put the blades in warm water the night before use them, they will last longer.