Optilon zippers are often used in older Holtkamper tents. These zippers are no longer in production, which means that, unfortunately, replacement zipper sliders are no longer available.
If only the slider is broken, it might seem logical to replace just that small part. However, with these older zippers, that is no longer possible. To ensure the zipper works properly and reliably again, the entire zipper must be replaced.
Do you own an older Holtkamper and are you unsure what type of zipper is in your tent? Please feel free to contact us. Ideally, include a clear photo of the zipper and specify the model and year of manufacture of your folding trailer. That will help us better assess your options.