The moisture meter can quickly measure the moisture content of the grain. 1. Large Diameter: Koło of a wheelchair with a large diameter of 4 inches provides fast and flexible movements with great stability. 2. Great material: adopting high quality rubber material, the wheel is slip and wear resistant when rolling. 3. Durable for you: equipped with a solid wheel hub, the tire will probably not deform under high pressure, it is safe to use. 4. Wide applications: allows for wide application on wheelchair, walker, roller skater, stroller, stroller and so on, very practical. 5. Easy to install: It is also lightweight and compact, simple installation can be completed quickly. Specification: Item Type: koło Wheelchair Material: rubber Wheel outer diameter: 4 inches Center bore of the wheel: approx. 8 mm / 0,31 inch Wheel width: approx. 23 mm / 0,91 inch List of packages: 1 x koło wheelchair Note: Do not use hypertension.