Ergotron stacking

Ergotron LX Dual Stacking 45-509-224

Ergotron – LX Vertical Stacking Dual Monitor Arm, VESA Desk Mount – for 2 Monitors Up to 40 Inches, 3.2-10kg Each – Tall Pole, White (45-509-216)

Ergotron Lx Series Dual Stacking Arm. Maximum Weight Capacity: 18.1 Kg Maximum S

Ergotron Lx Pro Arm Dual Display Stacking Esw