Steel Rebar #3, 3/8" diam X 24" - Carton of 40Steel Rebar #3, 3 8" diam. X 24" length #3 Rebar Made from carbon steel composite, #3 reinforcing bar or "rebar" is primarily used in swimming pool frames, road and highway paving, and patio and driveway construction. It also has important applications in the vineyard industry, as it is ideal for training rootstocks to grow as designated by its trellising system. The expansion coefficient of the carbon steel composite compares favorably with the