The BIQ Laser cut Sanguinololu or Ramps PCB mount board Prusa print bed Kit (4mm MDF) contains:

1 x MDF Sanguinololu / Ramps mount board.
1 x MDF 50mm Fan mount.
1 x MDF Prusa Sub bed board.
1 x 4mm MDF Prusa Print bed board.
1 x Fix It Block
3 x 4mm 20mm long Screws
3 x 4mm nuts
4 x Brass PCB Stand Offs
4 x 3mm 6mm long Screws

This kit is designed to accommodate the modified design of Prusa Mendel to take a PCB Heatbead Mk1. The parts replace the following (listed for the Prusa Mendel):

225mm×225mm print top plate

140mm×225mm print bottom plate

Universal in that it can be used to mount either a Sanguinololu or Ramps PCB. PCB not included – see here for kit with Sanguinololu PCB

Prusa Print Bed as shown on Thingiverse

PCB mount details can also be found here