Will hold up to three 27' Monitors up to 17. 6 lbs. Great accessory for Sit-to-Stand or regular desks. Enables higher productivity Adjustable height for ideal ergonomic positioning Includes adjustable clamp and a grommet mount to securely mount to any desk or surface up to 3.5' thick. Maximum extension 26'. Includes adjustable clamp and a grommet mount to securely mount to any desk or surface up to 3.5' thick. Maximum extension 26'.