Probably the most commonly used SMD diode on keyboard PCBs, the 1N4148W in SOD-123F form factor. While similar in size to the regular SOD-123, the additional F means that the two legs to be soldered are flush with the bottom of the diode, which makes it easier to solder and provides a better mechanical connection.
Basic specs are:
Repetitive Reverse Voltage Vrrm Max: 100V
Forward Current If(AV): 150mA
Forward Voltage VF Max: 1V
Reverse Recovery Time trr Max: 4ns
Forward Surge Current Ifsm Max: 2A
Operating Temperature Max: 150°C
Diode Case Style: SOD-123F
Take a look at the complete datasheet here: https://www.farnell.com/datasheets/2863997.pdf
Sold in increments of 10. Quantity 1 means 10 diodes, 2 means 20 diodes, etc.