30 replacement blades - Fits models such as: S300 S500i M500 M700 M1000 M1000i M1200i L1500 L1500i L2000i ID B M800i M900 S500i S Basic S450i S700i. WR130E M WR141E M WR142E M WR 143E M WR153E L WR155E etc. Advantages: ? 100% compatible with original blades. ? Premium stainless steel and titanium coating for excellent resistance to rust, acid, and alkali. ? Includes new Dacromet screws. ? Innovative extra coating for long lifespan. ? Sharp enough for perfect and efficient lawn mowing. Easy and quick to assemble. ? Space-saving. Small packaging box. Specifications: Replacement blade material: Stainless steel. Coating: Titanium. Quantity: 30 replacement blades, 30 Dacromet screws. Thickness: 0.04 inches/piece. Screw length: 0.51 inches. Robotic lawnmower replacement blade size: 1.38 x 0.67 x 0.004 inches. Package includes: 30 replacement blades. 30 Dacromet screws. Note: 1. The replacement blades are extremely sharp, be careful during assembly. Always wear gloves and safety glasses if needed. 2. Keep the titanium blades away from children and pets due to their sharpness.