374 thru 606 BBL silos constructed of 3/16” steel plate with ¼” domes top. 837 thru 1069 BBL similar with ¼” metal in 1-st band. Safety pressure relief valve with cover mounted on top of silo. 4” diameter fill line inside silo with camlock coupling. 8 aeration pads in cone with electric solenoid. Moisture – filter – regulator unit with pressure gauge. Inspection hatch on top of silo. Rust inhibitive primer and one color coat of industrial enamel: dunes tan, slate gray, white, or our new color “sand stone”.Butterfly valves, Bin level indicators, Filter vents, Ladders (with cage or safety belt), and work platforms can be supplies either by customer or by distributor.