These 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 mm The Through Hole headers have a Tail length of 2.3 mm for SIL and 2.4 mm for DIL The SMD mounting headers are perpendicular Gull-Wing type Sockets have Tin plated Brass sleeves with Flash Gold plated Beryllium Copper (4 finger) contact clips