The Exact-Air Lightweight air meter simply and accurately measures air content of fresh mixed concrete utilizing lightweight aggregates.  Built to demanding standards of our customers, the Exact Air Lightweight is constructed from super tough aircraft grade cast aluminum and is black anodized to resist corrosion from concrete mixtures. The Exact Air Lightweight can also be used as a pycnometer for determining specific gravity of sand, gravel and cement.  Supplied with stainless steel fast acting clamps, tamping rod, syringe, baffle funnel assembly, straight edge, spanner wrench, measuring cup and heavy duty plastic carrying case. Made in the USA.  Meets or exceeds ASTM C-173 and AASHTO T-196.