𝐔𝐒𝐄𝐑-𝐅𝐑𝐈𝐄𝐍𝐃𝐋𝐘 𝐃𝐄𝐒𝐈𝐆𝐍 - 𝟐𝟓-𝐌𝐈𝐍 𝐀𝐒𝐒𝐄𝐌𝐁𝐋𝐘: The DMASUN rowing machine arrives 75% pre-assembled and most users can easily assemble the rower in 25 minutes. With a small footprint, our magnetic rowing machine will save you 90 % storage space after being stowed upright.