Free for the taking: 10 18" Tall Triangle Cement Barrier Blocks with screw tops for mounting wood cross bars on if you want. I assume these are barrier blocks anyways; as they are free standing and pretty sturdy. These came with the house I got an the guy had a misc construction stuff left in the house and this is the last of it. Must Take All of them. Located Near 68th & Lake Otis See Photos. Location: Anchorage, AK (Lake Otis-68th) it's NOT ok to contact this poster with services or other commercial interests alaska