Home Furniture & Seating Seating, Tables & Pedestals Seat Hardware Heavy Duty Mainstay Adjustable Height Package with Swivel – 2-7/8″ (Adjustable Height: 14″ to 19-1/2″) Springfield Marine Heavy Duty Mainstay Adjustable Height Package with Swivel – 2-7/8″ (Adjustable Height: 14″ to 19-1/2″) $418.09 Heavy Duty Mainstay Adjustable Height Package with Swivel – 2-7/8" (Adjustable Height: 14" to 19-1/2") quantity Add to cart