Do you have a cage with a play top which is in need of a proper cover? In order to solve this problem, Colorday designs a unique cage cover specially for this kind of cage. Easy to install: Using magnet attached on bird cage . 10 seconds is enough to complete installation. Open the door at any angle: you can adjust the light in the cage by opening the door at any angle according to the needs of the birds. Effectively reduce distractions so to promote better sleep for birds . The design is specialized for bird cages with play top.