Q1: Are you trading company or manufacturer ? A:We are Industry and trade integration. Q2:Do you make customized products based on our design drawings? A:Yes, we are a professional factory with an experienced engineering team to make custom products as customers request Q3: How long is your delivery time? A: Generally it is 10-15days. Q4:What is the difference between anodized and mill finished? A: Mill is the raw state of aluminum as extruded - no surface treatment. Anodized (also known as Satin Clear or Clear Anodized) is an electrolytic process. This process increases corrosion resistance and weather resistance. Q5: Do you provide samples ? is it free or extra ? A: We supply free samples. Q 6:What are the advantages of using the 6000 series of alloys in aluminum extrusions? A: The 6000 series, which incorporates magnesium and silicon, provide good extrudability, strength, corrosion resistance, formability and machinability Q7: What is your terms of payment ? A: T/T,L/C,D/P,D/A,Money Gram,Credit Card,PayPal,Western Union,Cash, Escrow.