This listing is for a strip/pack of 10 Surface Mount Diodes. Each "item" you buy is 10 diodes.
Mini Melf (also known as MMA SOD-80 and DO-213AA) Size, that is 3.6mm Long, 1.4mm Diameter
This listing is for 1N5819 which is your bog standard schottkey signal diode with a reverse voltage of 40v, a forward voltage of 0.35v, and a maximum current of 1A.
Soldering MIni Melf by hand is really easy, just put some solder on one pad, grab the diode in your tweezers, re-heat that solder and plonk the diode in place, now solder the other end and you are done.