x 2 Test Strips, Professional Lightweight and Effective Tester, Portable PVC Test Paper, Light Test Cards. Note: This product page is only selling the 2-piece size. If you need other sizes/colors, please refer to the Questions & Answers section. Description: Feature: The reusable UVC light test card can test UVC light, primarily to determine the lamp type, and can also test the remaining UVC light intensity. Easy to Use: These intensity test cards are easy to use, easy to understand, and clearly indicate the test results. Easy to Observe: The UVC dose indicator card can be observed directly. When not exposed to light, the letters will disappear. The UVC light test card can be used in the box or under light. Different Uses: The UVC light identification card can be reused to detect different products containing UVC. Note: It is recommended to store the card in the packaging case to protect the testing area. Specification: Material: PVC Size Chart: 2.5cm x 7cm / 0.98in x 2.76in Package Includes: 2 UVC Light Test Cards (Pack of 2) Note: Please allow slight 1-2cm differences due to manual measurement.