HVAC parts material:galvanize steel, Iron,Aluminum;current tolerance:+/-0.005;we have special production line, output 150,000pcs HVAC partsmaterial:galvanize steel, Iron,Aluminum;current tolerance:+/-0.005;we have special production line, output 150,000pcs per lower costwooden pallet240pcs/packge 96packge/pallet 10pallet/container duct corner