A1: CE, ISO9001, ISO14000, ISO18000.
A2: Free samples but the transport fee on customer’s cost.
A3: Generally it is 5-10 days if the goods are in stock. or it is 15-20 days if the goods are not in stock, it is according to quantity.
A4: Payment<=1000USD, 100% in advance. Payment>=1000USD, 30% T/T in advance ,balance before shippment.