Features: 1. The tire liner is made of silicone rubber material, which is waterproof and heat-resistant. 2. With its improved traction and grip tires, it can help your remote-controlled car get out of trouble on complex terrains. 3. Three layer hollow design, providing a variety of soft and hard options. (The user can cut off part of the gasket or insert foam strips to achieve different hardness and softness that can be adjusted as required.) 4. Compared with the traditional foam pad, this silicone rubber pad provides more support on the side wall, which helps to maintain the shape of the tire and make it more suitable for the road surface. 5. 70g, 75g/Pcs to enhance the stability of the RC car. Specification Material: Silicone rubber Size: 10.8 x 4.2 cm (4.25 x 1.65 in) Red and Blue Plugins: Hard approximately 8KG RC Track Purple and Green Plugins: Soft 2-4KG RC Track Hardness: Blue and red are hard Purple and green are soft Color: Red, Magenta, Sky blue, Light green Weight: Blue and Red: 70 grams per piece (2.47 ounces) Purple and green: 75 grams per piece (2.65 ounces) Package Weight: 380 g Quantity: 4 Suitable for: 1.9 inch tires Package Include: 4x Waterproof Silicone Rubber Tire