If you are looking for a anemometer wind cup with reliable and , I will tell you that our product will be your . It adopts premium aluminium alloy material, can keep it for a lasting time. Features - Color: Black - Material:Aluminium alloy - Size: 17.00X17.00X5.00cm/6.68X6.68X1.97in - Made of metal which features with stability and durability, very hard and smooth for durable usage. - 3-cup design, speed of the wind can be determined according to the speed of the wind cup (the number of per second). - Effective monitoring, wonderful and practical present for a weather observation lover. - 3-cup Sensor is a to replace your broken or old anemometer measuring cup. - It suitable for direction measurement, and agricultural intelligent direction measurement. Package list: 1 x Replacement 3-cup Sensor(No Base)