Top part of cooker hood (Ashton-U-Lyne OL6)

Can anyone use this? I'm not sure what it's called maybe chimney?. It's just the top part that covers the electrics. Not the extractor fan itself. It's brushed stainless steel. I think they supplied an extra part in case of high ceilings but we don't need it. Measures 22 x 40 x 17cm