monitor arm keeps tilting down

Mount-It! VESA Mount Adapter Kit | TV Wall Mount Bracket Adapter Converts | Fits Most 23 Inch to 42 Inch TVs and Monitors | Hardware Included | Black

Premier Mounts Low-Profile Dual Stud Dual Arm Swing AM95

Ergotron Neo-Flex Mounting Arm for Flat Panel Display Black

Mount-It! Extra Long Ceiling TV Mount Bracket, 10 Feet Long, Fits 40 - 70 Inch Flat Panel Televisions, Adjustable Height Telescoping Tilt and Swivel

Planar Dual Arm Desk Stand 997-7031-00

Ergotech FDM-LIFT-2 Freedom Lift Dual Monitor 26.2" Keyboard Tray Desk Clamp

Mount-It! Height Adjustable TV Wall Mount Bracket with Counterbalance Gas Spring Arm, Full Motion Articulating Design Fits Up to VESA 400x400 mm

Allsop® Metal Art ErgoTwin Dual Monitor Stand in Black

Ergotron 45-268-026 Mounting Arm for Flat Panel Display Aluminum

Mount-It! Universal VESA Pole Mount | Full Motion TV Pole Mount Bracket | VESA 75 100 | Fits TVs or Monitors Up to 32 Inches

Ergotron Mounting Arm for Monitor TV White 45476216

StarTech Monitor Mount with Articulating Arm and Slim-Profile Design

Ergotron 61-128-085 Glide Wall Mount VHD

Tripp Lite Dual-Display 13-34" Monitor Flex-Arm Clamp/Grommet Mount DDR1732DAL

Ergotron DS100 Dual-Monitor Desk Stand

SIIG CE-MT2M12-S1 Mounting Arm for 32" Monitor - Black

StarTech Articulating Arms Height Adjustable up to 32" Dual Monitor Stand

Ergotron 200 Wall Mount Arm

Freedom9 Amer Mounts Dual Monitor Stand for 15"-24" Monitors - AMR2SU.

Ergotron Mounting Arm for Monitor, TV - 32in Screen Support - White

StarTech Desk-Mount Full Motion Articulating Monitor Arm

Ergotron Mounting Arm for Flat Panel Display Screens 30 to 60" 45304026

Ergotron Mounting Arm for Flat Panel Monitor Notebook 32" Screen Support

Ergotron 45-437-026 MX Mini Wall Mounting Arm for 24" Monitor, Polished Aluminum