Supports the following standards: ASTM C138, ASTM C1611, ASTM C192, ASTM C232, ASTM C29, ASTM C31, ASTM C403 Round, straight steel rod for use with concrete cylinder molds, slump cones and unit weight measures. Rod measures .625" (16mm) dia. x 24" (610mm) long. Both ends are rounded to hemispherical tip. Plated for rust resistance.