Q1:Can you provide a sample before a big order? A:Yes, we can. Q2.Whether there are some discounts for large quantities or not? A:To be honest,we not only offer discounts to you because of quantity but also discounts to you when we do the promotion during valve purchase season. Q3: If products have some quality problem, how would you deal with? A: Normally all our products get quality check and pressure testing before shipment. If quality problem due to wrong use, we will suggest some solution but not take cost; If it is products quality due to our production, we will provide solution and take related repair cost. Q4: How long is your delivery time? A: Generally it depends on quantity and products types. If goods are in stock, the delivery time is within one week. It will be 25-45 days if it is customer-made production. Q5. What is your payment term? A: T/T 30% for deposit, balance to be paid before shipment. or L/C. Q6.Do you offer customization or OEM service? A:Of course,it is customization when we finish production according to customers' requirements.If Brand OEM,please offer the brand letter of authorization to me for exporting later.