These corrugated crash barriers are brand new. They are 12″ deep, and the overall length is 3.5m but once they are overlapped to be joined or indeed a post is placed directly behind where they join, their effective length is 3.2m. They have a multitude of uses, including in the industrial / domestic market where they have many uses for traffic segregation, car parking and retaining walls. They can also be used in the agricultural market where something needs to look really good i.e. adjacent to new buildings or within close proximity to dwellinghouses.