Very sound product , well designed and a very worthwhile addition to provided peace-of-mind in heavy weather. Adjustable cam cleats and easy disassembly are clever features. No instruction however the Campsmart website has some usefully fitting information. I suggest you exercise care in fitting as a few of the YouTube videos on fitting are very wrong. I found it easier to fit the product to a properly rigged awning and mark the connection points on the van and awning roller rather than measure them. This will ensure the anti-flapper does not distort the awning fabric once fitted. Having the awning roller in the correct position is also imperative. For the less experiences this means on a Dometic awning the roller track that houses the pull-down tape should be at about 9 o'clock (facing the van) when viewed from the end.