מודרני 8 \ "x 30 \" אנטי-זז stair stair stair stair tread stair treat stair treat stair stair stair stair stair stair stair stair stair stair stair stair stair stair stair stair stair stair stair stair stair stair stair stair stair stair tread stair stair stair tread stair tread stair stair tread stair treat stair tread stair triad stair pvc stair stair stair stair stair treair stair stair stair stair stair stair stair stair stair st