The Sony KSS-190a and BU-1 laser mechs have a foam bump stop on the guide rod of the disc tray, which over time perishes and becomes useless.

These steel coil spring bump stops are an upgrade replacement which will last indefinitely.

Sold as singles.

I recommend fitting two springs, one at each end of the rod.

Please see my other listings for: 

  • Superior quality belts sets 
  • The correct type of oil for lubricating the tray loading guide rod and laser head guide rod.
  • The correct grease for use on the the tray loading mechanism.
  • Upgrade PTFE turntable motor thrust pad.