... ,Certification:ROHS,UL,ISO,CE 3,Type:Female 4,Color:Gray 0.4MM0.016 52PIN MINI PCI EXPRESS CARD SOCKET CONTACTS:Housnig Material ... : Phosphor BronzeSolder Materia: SPCCContact Plated: Gold Plating in the contact area, And Tin Plating in the solder tail area,With 50u min ... MaxWithdrawal force: 2.3Kgf MaxDurability: Insert&Withdraw 50 cycles. 52 pin MINI PCI EXPRESS