The covers are designed to fit all of the awnings we are currently selling standard, half cassette and full cassette, manual and electric. Please Note: If you bought an awning from us before 2008, our spare covers may not be suitable as you may have a slightly different model please contact us first to confirm that the cover will fit the awning that you have. The covers are easy to fit the whole process of taking one cover off and putting another one on should take between half an hour and an hour. The covers are designed for Primrose Awnings, we can't guarantee compatibility with opther styles.