Description These are some professional and convenient UV Light Testing Cards, aimed to provide reliable UV testing result in few seconds. Accurate measurement, perfect display of UVC-UVA effect, can be taken much more easily, bring you good using feeling. Suitable for testing disinfection box, disinfection cabinet, lamp and other environment. Features - Color: Assorted Color-Material:PVC- Size: 7.20X2.70X1.00cm/2.83X1.06X0.39in - A professional test card specially designed for high-power UVC equipment, providing higher analyte contrast under high ultraviolet light. -High precision, simple operation,UVC Test Cards areeasy to carry with small size. - UVC test card for unprecedented quality control of UV analyte production and calibration. - Take one under the light. When the color of the card changes from white to dark purple or light green, your device is valid. - Sufficient number gives you the opportunity to repeat the test, and the accuracy of the result is guaranteed after repeated tests. Packing list: 30 x Testing StripsNote: 1. Please allow 1-3 mm error due to manual measurement and 1-3g weight error make sure you don't mind before ordering. 2. Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please make sure you don't mind before ordering, thank you! About Shipping: 1.please pay attention to your delivery address such as: name, street, house number, doorbell/email without name, etc. is correct, or the order will not be delivered correctly. 2.All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances. 3.During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 24 hours Hope you have a pleasant shopping experience!