Sold in packs of 10s. 

Specifications

• LUBED
• Type :  Linear
• Mounting Type :  PCB Mount (5-pin)
• Top :  Nylon
• Bottom :  Nylon
• Stem :  UMPWPE (12.75mm)
• Spring:
  • Length : 19.5mm
    
  • Bottom force :  55g 
• Travel : 4.0mm
• Manufacturer :  Gateron