Made of silicone rubber materials, waterproof and temperature . 70g/pcs weight offer counterweight effect, improving the stability of your RC car. More superb sidewall support than regular foam to keep the shape of tires. It improves traction and grip to help your rig to out of tough situations. Suitable for 1.9 CNC wheels, recommended to use S3 compound tires. If use your own wheels, please check whether the size of foam fit with your clamp ring. Material: rubber colour: blue Package Contents: 4 x Rubber Foam Tire 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.