30 Replacement Blades - For 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. Benefits : 100% compatible with original blades. Premium stainless steel and titanium coating for excellent rust, acid and alkali resistance. Put in the new Dacromet screws. Additional innovative coating for long life. Sharp enough for perfect and efficient cutting of the grass Easy and quick to assemble. Save space. Small packaging box Features: Replacement blade material: stainless steel. Coating: titanium. Quantity : 30 spare blades, 30 Dacromet screws. Thickness: 0.04 inches/piece. Screw length: 0.51 inches. Dimensions of the replacement blade for the automation: 1.38 x 0.67 x 0.004 inches. Content : 30 replacement blades. 30 Dacromet screws. Noticed : 1. Replacement blades are extremely sharp, please take this into account when assembling. Always wear gloves and, if necessary, protective glasses. 2. Please keep titanium knives away from children and animals due to their sharpness.