monitor arm keeps tilting down

Mount-It! Triple Monitor Mount, Desk Stand with USB & Audio Ports, 3 Counter-Balanced Gas Spring Height Adjustable Arms Fits 24 - 32 Inch VESA Screens

StarTech Monitor Mount for Two Displays - Up to 24" Screen Support

Amer HYDRA2 Dual Monitor Mount with Articulating Arms - 15" to 28" Monitors

Refurbished: AVF Desk Mount for Flat Panel Display 13" to 27" Screen Support 33.07 Black Manufacturer Refurbished

Mount-It! Full Motion Height Adjustable Single Monitor Wall Mount | Tilt, Rotate, Swivel Arm Wall Mount Stand | Fits Up to 32 in. Screens

Mount-It! Dual Monitor Arm Mount Desk Stand Two Articulating Gas Spring Height Adjustable Arms | Fits Up To 32" | C-Clamp and Grommet Bases | Black

Premium Height Adjustable Double Monitor Arm Black - Rocelco: Ergonomic Dual Screen Stand, 13"-27" Compatibility, VESA 100x100

Mount-It! Height Adjustable Dual Monitor Arm Mount Desk Stand Fits Two 24 to 32 Inch with C-Clamp, Grommet and 2 x 3.0 USB Ports, VESA 75 100 Screens

Mount-It! Dual Monitor Arm Mount Desk Stand | Articulating Mechanical Spring Height Adjustable | Fits Two 17 - 32 Inch Screens | C-Clamp and Grommet

Amer Mounts HYDRA2B Dual Monitor Clamp Mount with Articulating Arms

Fellowes 8043301 Platinum Series Single Monitor Arm

Peerless-AV Paramount Pivot Wall Mount for 22" to 43" Displays PP740

MSI Mounting Arm for Monitor Matt Black MAGMT201

Mount-It! Full Motion Adjustable Single Computer Monitor Desk Clamp Mount Up to 32" Black

SIIG Easy-Adjust Dual Monitor Desk Stand for 13" to 27" Displays

SIIG Dual Monitor Desk Stand for 13" to 27" Monitors

StarTech ARMDUOSS Up to 24" Adjustable Dual-Monitor Stand

SIIG MTPRO Desk Mount Dual Gas Spring Monitor Arm - up to 32" Display

Allsop® Metal Art ErgoTwin Dual Monitor Stand

Mount-It! Full Motion Single Monitor Desk Mount, Height Adjustable with Gas Spring Arm

MSI Mounting Arm for Monitor Matte Black Horizontal/Vertical MAGMT201D

Mount-It! Single Height-Adjustable, Articulating, Pivoting, Swiveling, Tilting, Arm Desk Mount for LCD, LED, Computer Monitor Displays, Silver