Check the listing for details. (1) ERGONOMICALLY COMPUTER DESK KEYBOARD ARM 500745890. Condition: New. Listed at 134.97 USD. DESCRIPTION : QT : 1 NEW UNIT Richelieu 500745890 Sit/Stand Series- Height range: 8.25" above track and 5.88" below track.- Reduced neck length lets user be closer to desk.- Superior lock-up, increased stability, and improved tilt position accuracy.- Dial tilt gauge shows the angle of the tray from -15° to 10°.- Sit-Stand arms incorporate height gauges to mark user's optimal ergonomic keyboard position.- With a 360° swivel, user can move keyboard freely from side to side.Included products- Sit/Stand arm- 21" track system- Mounting hardware- Product instructionsAttributes Additional Information: Teflon Glide Articulated ArmDepth - Overall Dimensions: 21.75 inFinish: BlackHeight - Overall Dimensions: 5.9 to 8.25 inMaterial: Steel/PlasticOverall Dimensions - Depth: 21 3/4 inProduct number: 500745890Product №: 500745890Standards and Certifications: ANSI/BIFMA, ADASwivel: 360°Track Length: 21.75 inWidth - Overall Dimensions: 7.7 in