It is partially pre-assembled and can be moved around easily. It is more stable than one rail. It prevents the flip-over when rowing.
Merach Rowing Machine, Magnetic Rower Machine for Home, 16 Levels of Quiet Resistance, Dual Slide Rail with Max 350lb Weight Capacity, App Compatible with LCD Monitor, Q1S
MERACH Rowing Machine, Magnetic Rower Machine for Home, 16 Levels of Quiet Re...
Merach Rowing Machine, Magnetic Rower Machine for Home, 16 Levels of Quiet Re...
Rowing Machine, Magnetic Rower Machine for Home, 16 Levels of Q1S - Magnetic
