Dear friends. Please pay attention to the following instruction upon receipt of our tokens The bga chips you buy from our company are high-tech and as accurate as nanometer. For the small amount of chips, they are exposed to air after being removed from the package. Then they will probably adhere to some moisture. So in order to avoid quality problems, we suggest you put them inside a baking chamber for at least 24 hours at 100°-110°. When welding, make sure the temperature for lead-free/chip-free bga pb is 245°--260°(max), lead/pb bga chips 180°--205°(max). The welding process is complicated. Welding/replacement chips should be operated by engineers who have proficient skills. Because bga chips are fragile, complicated structured, with numerous balls, any slightly defective positioning, careless temperature control, or incomplete cleaning pcb boards will result in insufficient solder or missing solder. The chips will die as a result. The bga chips are easily broken by improper welding. Before buying, you should consider 3 points: 1) Did you buy the right chips? 2) Do you have suitable equipment? 3) Are you skilled enough to weld the chips? Our advantage is that Our company has been specialized in bga chips for more than 10 years. We are very familiar with the performance of the chip. The quality of the chip is very strict control, to ensure that every chip sent is very good quality. We welcome all who are experienced in bga chips to buy in our store again. For those who are not familiar with bga chips, we would decline with thanks. Shipment of goods 1.-We can ship the products to all over the world. Free shipping by air mail. 2.-DHL, FEDEX, TNT, UPS, EMS, Aliexpress Standared Shipping are all available. 3. make sure your delivery address and t number