Specifications Name: Heavy duty Universal Robot Lawn Mower Accessories Material: steel Size: 3.5 x 1.8c x 0.06cm/1.38x 0.71 x 0.02 inches (approximately) Describe Consistent cutting accuracy: Made of high-quality rust resistant steel and titanium carbide alloy, these replacement heads ensure smooth cutting patterns every time, creating a beautifully trimmed lawn. Enhanced compatibility: various Mammotion Luba and robotic lawn mowers Easy Cutting: These replacement heads provide precise cutting capabilities, making it easy to maintain a healthy lawn. First class structure: These replacement heads are designed with first-class manufacturing processes, ensuring durability, eliminating rust issues, and providing consistently satisfactory cutting results over time. Comprehensive replacement kit: Each package includes replacement heads and screws to ensure you have sufficient supply to keep your lawn mower running at its best. Product list 24 pcs/30pcs/36pcs lawn mower head replacement (including screws, washers)