PGA /CPU socket system:all products use import material,and individual function through all kinds of tests to make sure the quality .the use range is test protect produce chip of computer motherboard. PGA socket position:PGA370P,PGA478P/479P,PGA563P,PGA603P/604P,PGA638P,PGA754P,PGA939P/940p,PGA959P Pinlength:4.80mm,5.15mm,5.50mm,5.90mm,6.35mm,7.40mm,8.25mm pitch:1.27mm/2.54mm Lnsulator material:import PPS(yellow,white)FR-4 import glass firbe . Hardware material:outer sleeve import finished product.clip material is import Beryllium copper. plating(outer sleeve):clip (full gold) competition price ang high quality,meet the ROHS standard.