A:AnswerHello! This bed rail is for suitable for use with mattresses that are a minimum of 4 inches thick to a maximum of 10 inches thick. That being said, the product is only designed to work if the mattress is flat, and is not able to be customized if the mattress is partly inclined.
A:AnswerHello! The product instructions can be found at the link below...
https://files.bbystatic.com/mcXiwWuArLymNyV4N0hJvg%3D%3D/43be52ff-4907-4e70-9b32-e431d2556890.pdf