Base price includes:

• Choice of Big Board 500 or Compact Big Board 550 keyboard tray
• Choice of GEL palm support with synthetic leather cover
• 6G mechanism and mounting track (more arms available, see below)

Humanscale 500 Humanscale Big Board Keyboard Platform
Complete System - 15 yr Warranty

Large enough to accommodate both keyboard and mouse. Palm support easily moves from left to right to allow mousing on either side of the platform. Big Board dimensions: 27" wide x 10 5/8" deep, Compact Big Board dimensions: 25" wide x 10 5/8" deep.

Arm Mechanism: This is the "arm" that slides into the track that gets mounted to the underside of your desk. The available arm options are shown below.

Track Length: Measure the amount of flat space you have on the underside of your desk to determine which track length you can use. The longer the track you can utilize, the farther back underneath the desk you can retract the system. Tracks measure 5.5" wide and are available in the following lengths: 22", 18", 16" 14" and 11". The 22" track is required for most arm to fully retract under the desk when not in use. The 6GSM is the only arm that fully retracts the platform under the desk with an 18" track. 

Lateral Slider: This option allows the platform to be adjusted left or right a total of 8" for optimal platform positioning. It can be added to any arm mechanism.