C Profile The most simplistic of our range of profiles. Suitable for internal applications and short term external applications. Use JN (internal, non re-enforced Jonc) only. Pros - only 9mm deep, can be bent / curved around a surface. Cons - requires a fixing at 150mm centres max, single use. Note* all Crystal tensioning profiles require a solid fix for the graphic to reach optimum tension. Failure to get a solid fix can have detrimental effects on the graphics tension. samples of 'C' Profile from our Flickr page You must be logged in to post a comment.