The replacement tire is compatible with for 240, 241, 244, 320, 380, 381 robots, and also compatible with Mint 4200, 4205 robots. The outer diameter of the replacement tire is about 4.8cm, the thickness is about 0.5cm and the width is about 1cm. Each tire weighs only 10g, which is small and light. It is made of soft rubber, more wear- and , providing long-lasting performance to your robot broom. The texture of the tire provides excellent ground traction, whether on smooth floors or carpets, to the stable movement of the robot washer, effectively prevent slipping and slipping, and make cleaning more efficient. No professional installation skills are required, and it is easy to remove the old tire from the plastic wheel and replace it with a new rubber tire. No special tools are required to quickly restore your mop robot to its best condition. Colour:Black Material:rubber Package Contents: 2 x Tires 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.