brand new and high quality Features: It is of good electrical conductivity and mechanical connection performance. With this product, it will not be necessary to clean up the welding plate, and directly drag the tin point on the main plate and bridge for BGA welding, which will be faster and won'for t damage the welding plate due to mistakes. Widely used in tinplate, flux, organic synthesis, chemical production, alloy manufacturing, and assembly of multiple integrated circuits in the electronics industry. 7 botttles of 12.5K soldering balls as follows: 1 0.25mm Lead Soldering Ball 12.5 K 1 0.3mm Lead Soldering Ball 12.5 K 1 0.35mm Lead Soldering Ball 12.5 K 1 0.4mm Lead Soldering Ball 12.5 K 1 0.45mm Lead Soldering Ball 12.5 K 1 0.5mm Lead Soldering Ball 12.5 K 1 0.6mm Lead Soldering Ball 12.5 K Specification: Balls Alloy:Sn 63/Pb 37 Color: Sliver Ball Size: 0.25mm/0.3mm/0.35mm/0.4mm/0.45mm/0.5mm/0.6mm (diameter) Quantity: 7 Bottles Note: No retail package Transition: 1cm=10mm=0.39inch Please allow 0-1cm error due to manual measurement, please make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 7 Bottles x Soldering Ball