Features: Designed for seamlessly compatibility with A1 robotic lawn mowers, these anti slippage pulley wheels ensure stable operation on slippery or uneven terrain while enhancing mowing efficiency and safety. Crafted from rubber, the 100x40mm wheels feature a wear resistant construction that minimizes belt pulley abrasion, maintaining performances and extending your mower's lifespan. Ideal for homeowners and landscaping professionals seeking reliable traction solution to optimize their A1 robot's grass cutting precisions across diverse outdoor environments. Perfect for maintaining residential lawns, gardens, or sports fields, these wheels provide exceptional grip on wet grass, slopes, and surfaces to deliver consistent mowing results. Engineered with tool free installation and a 150kg load capacity, this 4 pack set offer upgrades to prevent wheel slippage and ensure uninterrupted lawn care operations. Specifications: Material: Rubber Color: Black Diameter: Approx. 3.93inch(10cm) Applicable Model: For A1 Package Includes: 4x Rubber Nonslip Wheel note: Please allow 1-2cm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color from the item.