Stanley 4085BC #4 Weldable Rebar is designed for use in foundation construction, concrete forms and post reinforcement. ASTM A615-14 Grade 40. Size: 1/2" x 36"No 4 nominalMaterial: SteelWeldablePlain Steel Rebarfor use in foundation construction, concrete forms and post reinforcementASTM A615-14 Grade 40.