I bought this product Fits my Black Magic Assists 4K as the BMA 4K does not come with a sun visor and has no way of attaching a standard sun visor to it. This product is perfect for the BMA 4K so you can continue to Gain access to all inputs and outputs on the device. Actually there is only one reason why I cannot give this product 5 stars! Functionality, this product does the job it was designed for, but given what the product is made of (cardboard, elastic, fabric and velcro ka, only about 2 pounds of material) there's absolutely no good reason why it's 60 should cost dollars. .Unfortunately in the movie industry, manufacturers will create unique products like this that provide a solution to a problem that no other product can solve, and because there is a high demand for the product and a lack of competition, often manufacturers will inflate prices what I believe. happened here.