Long lifespan: The blades are made of stainless steel - this material gives the blades longer lifespan and hardness as well as excellent rust protection Long trimmer blades for grass, 35 x 18 x 0.75mm silver, 9 pieces per plastic box Note: The data is all manual measurement, please allow an error of 1-3 cm. Due to the difference in light and display, there will be a certain color difference depending on the physical object received. Delivery quantity: (according to the main picture)"