1.27 mm IC Socket ConnectorsThese Swiss Preci-dip IC Ultraminiature PCB Socket Connector headers are solder tail Through Hole or SMD perpendicular Gull-Wing mount.Mating pin Ø 0.38 mm - 0,5 mmThe Through Hole headers have a Tail length of 2.3 mm for SIL and 2.4 mm for DILThe SMD mounting headers are perpendicular Gull-Wing typeSockets have Tin plated Brass sleeves with Flash Gold plated Beryllium Copper (4 finger) contact clipsStandardsUL 94V-0