This armrest is compatible with Tapio Anttila Collection’s Day&Night sofa bed and chair bed. The armrest helps you to lift the top piece of the bed frame on the floor and adds extra comfort for lounging. The Day&Night sofa bed can be equipped with one or two armrests according to your liking, while the Day&Night chair bed is designed for just one armrest. Thanks to the pre-drilled holes in the bed frames, you can decide which side you want to mount the armrest.