Quantity : 18 piecesBlade color: GoldSize: 49.5*19*1mmMaterial: 420J2 stainless steelHardness: 52HRCScrews: The screws are rust-proof, fade-resistant and wear-resistant.High Quality: Made of high-quality stainless steel with titanium coating, excellent rust resistance, acid and weather resistance. alkalis, wear resistance and long service life. High cutting performance: 1mm thick soft edge, sharp, gently mow the lawn, hold a little grass at a time, fertilize the soil naturally, keeping the lawn clean, green and healthy.Titanium Coating: Not only provides better protection against oxidation, but also keeps the gas trimmer in good working order, even in bad weather, with less deposits and long life.EASY TO REPLACE AND REVERSIBLE: Very easy to install and replace with screws (included), the end caps are double-sided and you can flip them left and right.