Compatible with all i& Series models, including i3, i3+, i4, i6, i6+, i7, i7+, i8, i8+, E5, E6, E7, j7, j7+, 7550, 3550, 3150, 5150, 6198, and 7150. Non-Slip: Wheel tires are designed to improve traction on slippery or uneven surfaces, ensuring smooth movement and preventing slipping. Premium Quality: Made of high-quality rubber, durable and elastic, provides smooth operation and prevents skidding on floors, enhancing cleaning efficiency. Easy to Install: Remove worn rubber tire and replace with new one. Front caster wheel is easy to replace and snaps into place without tools. It is recommended to replace the tire tread every 6 to 12 months for optimal performance. Regularly clean the front caster wheel. Color: Black Material: Plastic Package Contents: 2 x Side Brushes 2 x Tires 1 x Front Wheel Caster 1 x Screwdriver 1 x Cleaning Brush Only the items listed are included; other products are not included. Note: Due to light reflection and differences in display screens, the color in the image may vary slightly from the actual product. Measurement may vary by +/- 1-3 cm.