This product is made of high quality plastic with excellent rust resistance and long durability, which is designed to provide stronger traction for the robot mower on wet or sloping lawns, avoiding slipping and affecting the operation results. It is easy to install and not only improves the mowing efficiency after use, but also protects the lawn from damage and keeps it beautiful and tidy. This material is known for its excellent resistance, can be in long-term with moisture, soil and other environments to maintain a clean as new, Its excellent tensile strength and hardness also ensures that the anti-slip nails are not easily deformed and worn out when subjected to repeated pressure and friction, thus prolonging the overall service life, reducing the frequency of replacement, and saving you maintenance costs. The spikes are precisely sized at 205mm long and 2.5mm thick, and have been carefully calculated and tested to that they provide effective traction without causing excessive damage to the lawn. For S300 [WR130E], M500 [WR141E], M700 [WR142E], M1000 [WR143E], S450i [WR101 SI], S450i [WR102SI], s; 500i. WR105SI], S450i [WR106SI], S700i [WR101 SI], M800i [WR111MI], M800i [WG757E], M900 [WG758E], M1000i [WG796E.1], M1]. 00i ID B. [WR113MI], M500 2.0 [WR165E], M700 2.0 [WR167E] Product Name: Lawnmower Spike Size:205x2.5mm Fitment:For Color:As Shown Material:plastic Package Contents: 2 x Lawnmower Spike 12 x Nail 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.