Black powder coated, 14 gauge, 1" steel tube construction with non-marring rubber leg caps Pre-Drilled hole pattern to mount seat or hardware with dual hole patterns accommodate multiple mounting options - standard 5 1/4" and 5 1/2" hole patterns Center retainer bracket fits kingpin post for additional safety Mount 2 separate boat seats for comfortable "Side by Side" seating arrangement, seats and seat mounts not included Very stable seat platform, Class B certified per ABYC standards with 700 lbs. capacity