It can be split apart into 37mm and 72mm lens hood, the 37mm lens hood can be used on a 37mm DSLR camera lens, and the 72mm lens hood can be used in a wide wide-angle lens.
The lens hood can block stray light to improve the image and video quality, at the same time it can also prevent lens flare and ghosting.
It can protect your lens to avoid abrasion when you shooting outdoor.
This lens hood is made of ABS environmentally friendly material which makes it very durable to use in a long time.