Fashion Life Pro Pvc Reptile Terrarium Uvb Light Lamp Test Card Orange Professional Structure Durable Safe Herp This card contains UVB discoloration bar which can detect UVB strength when environment changes. It is suitable for detecting outdoor UVB content or UVB test in the UVB lamps ( less than standard UVB5.0 discoloration effect is very tiny ). Material: PVC. Color: orange. Size: 8.5 x 5.4 cm.