This tyre patch roller tool is made of wooden handle and stainless steel wheel, which is very durable and portable. It is designed to roll down hose and tire repair stains to remove trapped air to ensure good adhesion and seal between patch and tire. There are bearings inside, which can make this tool easier and more labor-saving. Specifications ✔ Name of the item: tyre patch wheels ✔ Material: wood and stainless steel ✔ Wheel diameter: 38 mm, 1.49 inches ✔ Wheel thickness: 7 mm to 0.27 ✔ Total length: 183 mm to 7.2 inches ✔ Package weight: 125 g/0.27 lbFeatures: 1. Designed to roll tube and tyre repair patches to remove trapped air to ensure good adhesion and seal between patch and tyre. 2. Made of wooden handle, which is durable, lightweight and portable. 3. Bearing inner design makes it easier and more laboratory. Package includes: 1 x tyre patch. Note: Please allow 1-5 mm error due to manual measurement. Thank you for your understanding.