This is a procurement for 79 total precision aluminum alloy bars, split into three lots of 44, 20, and 15 pieces. The bars must meet specific dimensional tolerances and conform to one of several listed material standards. The contractor must provide material certification and mark specific heat numbers on each article if the material lot contains multiple heats. A CDRL #2 is required for delivery. No budget, performance location, or non-bid timelines are specified in this description.