brand new and high quality. The card contains UVB color test strips, which can detect the UVB strength of environmental transformation. Small size and easy storage. Suitable for people with reptiles. Reusable,suitable for detecting outdoor uvb content or uvb testing on Card only. Type: UVB test card size:8.4*5.3cm Material:PVC Package Contents: 10 * UV Test Card Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. Instructions for use: The weak and weaker ultraviolet rays will not harm the human body and need no protection. Ultraviolet rays above the medium will damage the skin and glasses and must be protected. This card is made of ultraviolet color-changing materials, which is only sensitive to ultraviolet rays, and other visible light is invalid. Place the UV sensitive area of the card in the sun, the stronger the UV in the sunlight, the darker the color. This card is used to test the intensity of ultraviolet rays in sunlight, and it can also be used to test the protective effect of anti-ultraviolet products. This card can be used repeatedly, it is a good helper for outdoor sports, travel and sun protection