compatible: For Luba and Yuka series of robotic lawnmowers. (LUBA 1000 to LUBA 5000 LUBA 2 3000 to LUBA 2 10000 YUKA 600 to YUKA 1500,etc.) First-Class Workmanship : Our are made of stainless steel. This makes them , robust, shatterproof and -. In additional, 2 hole design can be flipped and used on both sides,Can be used up to 4 times. Quality Screws and Washers - These screws have a good anti-rust and anti- effect. The safety varnish and plastic washers protects against vibration-related unscrewing. Cutting Performance: These replacement produce an evenly smooth cutting pattern, the result is a beautiful, even lawn pattern and thus a permanently healthy lawn. Color: Silver Material: Stainless Steel Package Contents: 60 * 60 * Screws 60 * 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.