Guaranteed compatible:100% compatible For Luba and For Yuka series of robotic lawnmowers. (For LUBA 1000 to LUBA 5000 | For LUBA 2 3000 to LUBA 2 10000 | For YUKA 600 to YUKA 1500,etc.) First-Class Workmanship Blades: Our blades are made of high-quality stainless steel. This makes them , robust, shatterproof and -. In additional, 2 hole design blades can be flipped and used on both sides,Can be used up to 4 times. Quality Screws and Washers - These galvanized screws have a good anti-rust and anti- effect. The safety varnish and plastic washers protects against vibration-related unscrewing. High-quality Cutting Performance: These replacement blades produce an evenly smooth cutting pattern, the result is a beautiful, even lawn pattern and thus a permanently healthy lawn. The colors of screws and washers are random in different batches, and specified colors are not accepted. Color: Gold Material: Stainless Steel Package Contents: 40 x replacement blades including screws and washers Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.