You buy from the manufacturer.

Plastic transparent poster bar, designed for inserting posters, displays, etc. The front and rear parts of the rail fit together without play and hold the inserted flyer. We produce the strip by extrusion from material with UV protection, in sizes 17 and 30 mm. We can cut the strip according to your request or produce it in the required length. The maximum length of the strips can be 3000+ mm. For larger quantities we can also produce in other colours. You buy from the manufacturer