steel fence Diameter: 1/4" - 2" . Standards: ASTM A569, 568, 513 SCH40 Features: 1) Diameter: 1/4" - 2" .2) Standards: ASTM A569, 568, 513 SCH40. The material: Q195-Q235, SPHC, SPHD, SPHE, SAE10063) Fence steel pipe used on outdoors, around back-yard and farm or factory, etc.